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High

Security advisory

Type: advisorySources: OSVCVE: CVE-2019-16869

Netty before 4.1.42.Final mishandles whitespace before the colon in HTTP headers (such as a "Transfer-Encoding : chunked" line), which leads to HTTP request smuggling.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2019-16869
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 10:46 UTC · Revision 1

Source evidence

CVE-2019-16869

core-osv · Original source

Published 26 Sept 2019, 16:15 UTC

Netty before 4.1.42.Final mishandles whitespace before the colon in HTTP headers (such as a "Transfer-Encoding : chunked" line), which leads to HTTP request smuggling.

osv:CVE-2019-16869
Complete source record
{
  "id": "8ca75e5169f3f72a8a6b3e03140feb2d95b93b46616626fd921f9f84ca461f14",
  "url": "https://osv.dev/vulnerability/CVE-2019-16869",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-16869",
    "summary": "Netty before 4.1.42.Final mishandles whitespace before the colon in HTTP headers (such as a \"Transfer-Encoding : chunked\" line), which leads to HTTP request smuggling.",
    "evidence": "osv:CVE-2019-16869",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-16869",
      "aliases": [
        "CVE-2019-16869",
        "GHSA-p979-4mfw-53vg"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/netty/netty",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "bd907c3b3acf3d746ad1143270224aa0f784cd1b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.1.42"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "netty-4.1.41.Final",
            "netty-4.1.40.Final",
            "netty-4.1.39.Final",
            "netty-4.1.38.Final",
            "netty-4.1.37.Final",
            "netty-4.1.36.Final",
            "netty-4.1.35.Final",
            "netty-4.1.34.Final",
            "netty-4.1.33.Final",
            "netty-4.1.32.Final",
            "netty-4.1.31.Final",
            "netty-4.1.30.Final",
            "netty-4.1.29.Final",
            "netty-4.1.28.Final",
            "netty-4.1.27.Final",
            "netty-4.1.26.Final",
            "netty-4.1.25.Final",
            "netty-4.1.24.Final",
            "netty-4.1.23.Final",
            "netty-4.1.22.Final",
            "netty-4.1.21.Final",
            "netty-4.1.20.Final",
            "netty-4.1.19.Final",
            "netty-4.1.18.Final",
            "netty-4.1.17.Final",
            "netty-4.1.16.Final",
            "netty-4.1.15.Final",
            "netty-4.1.14.Final",
            "netty-4.1.13.Final",
            "netty-4.1.12.Final",
            "netty-4.1.11.Final",
            "netty-4.1.10.Final",
            "netty-4.1.9.Final",
            "netty-4.1.8.Final",
            "netty-4.1.7.Final",
            "netty-4.1.6.Final",
            "netty-4.1.5.Final",
            "netty-4.1.4.Final",
            "netty-4.1.3.Final",
            "netty-4.1.2.Final",
            "netty-4.1.1.Final",
            "netty-4.1.0.Final",
            "netty-4.1.0.CR7",
            "netty-4.1.0.CR6",
            "netty-4.1.0.CR5",
            "netty-4.1.0.CR4",
            "netty-4.1.0.CR3",
            "netty-4.1.0.CR2",
            "netty-4.1.0.CR1",
            "netty-4.1.0.Beta8",
            "netty-4.1.0.Beta7",
            "netty-4.1.0.Beta6",
            "netty-4.1.0.Beta5",
            "netty-4.1.0.Beta4",
            "netty-4.1.0.Beta3",
            "netty-4.1.0.Beta2",
            "netty-4.1.0.Beta1",
            "netty-4.0.15.Final",
            "netty-4.0.14.Final",
            "netty-4.0.14.Beta1",
            "netty-4.0.13.Final",
            "netty-4.0.12.Final",
            "netty-4.0.11.Final",
            "netty-4.0.10.Final",
            "netty-4.0.8.Final",
            "netty-4.0.7.Final",
            "netty-4.0.6.Final",
            "netty-4.0.5.Final",
            "netty-4.0.4.Final",
            "netty-4.0.3.Final",
            "netty-4.0.2.Final",
            "netty-4.0.1.Final",
            "netty-4.0.0.Final",
            "netty-4.0.0.CR9",
            "netty-4.0.0.CR8",
            "netty-4.0.0.CR7",
            "netty-4.0.0.CR5",
            "netty-4.0.0.CR4",
            "netty-4.0.0.CR3",
            "netty-4.0.0.CR2",
            "netty-4.0.0.CR1",
            "netty-4.0.0.Beta3",
            "netty-4.0.0.Beta2",
            "netty-4.0.0.Beta1",
            "netty-4.0.0.Alpha8",
            "netty-4.0.0.Alpha7",
            "netty-4.0.0.Alpha6",
            "netty-4.0.0.Alpha5",
            "netty-4.0.0.Alpha4",
            "netty-4.0.0.Alpha3",
            "netty-4.0.0.Alpha2",
            "netty-4.0.0.Alpha1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-16869.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:37.840122713Z",
      "provider": "osv",
      "references": [
        "https://github.com/poc-effectiveness/PoCAdaptation/tree/main/Adapted/CVE-2019-16869/5.0.0.Alpha1/exploit",
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        "https://lists.apache.org/thread.html/re0b78a3d0a4ba2cf9f4e14e1d05040bde9051d5c78071177186336c9%40%3Ccommon-issues.hadoop.apache.org%3E",
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        "https://lists.apache.org/thread.html/re78eaef7d01ad65c370df30e45c686fffff00b37f7bfd78b26a08762%40%3Ccommon-issues.hadoop.apache.org%3E",
        "https://lists.apache.org/thread.html/re78eaef7d01ad65c370df30e45c686fffff00b37f7bfd78b26a08762@%3Ccommon-issues.hadoop.apache.org%3E",
        "https://lists.apache.org/thread.html/rf2bf8e2eb0a03227f5bc100b544113f8cafea01e887bb068e8d1fa41%40%3Ccommon-issues.hadoop.apache.org%3E",
        "https://lists.apache.org/thread.html/rf2bf8e2eb0a03227f5bc100b544113f8cafea01e887bb068e8d1fa41@%3Ccommon-issues.hadoop.apache.org%3E",
        "https://lists.apache.org/thread.html/rf5b2dfb7401666a19915f8eaef3ba9f5c3386e2066fcd2ae66e16a2f%40%3Cdev.flink.apache.org%3E",
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        "https://access.redhat.com/errata/RHSA-2019:3892",
        "https://access.redhat.com/errata/RHSA-2019:3901",
        "https://access.redhat.com/errata/RHSA-2020:0159",
        "https://access.redhat.com/errata/RHSA-2020:0160",
        "https://access.redhat.com/errata/RHSA-2020:0161",
        "https://access.redhat.com/errata/RHSA-2020:0164",
        "https://access.redhat.com/errata/RHSA-2020:0445",
        "https://lists.debian.org/debian-lts-announce/2019/09/msg00035.html",
        "https://lists.debian.org/debian-lts-announce/2020/02/msg00018.html",
        "https://lists.debian.org/debian-lts-announce/2020/09/msg00004.html",
        "https://usn.ubuntu.com/4532-1/",
        "https://www.debian.org/security/2020/dsa-4597",
        "https://seclists.org/bugtraq/2020/Jan/6",
        "https://github.com/netty/netty/compare/netty-4.1.41.Final...netty-4.1.42.Final",
        "https://github.com/netty/netty/issues/9571"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*"
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            "vendor_product": "canonical:ubuntu_linux",
            "extracted_events": [
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                "range": [
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                    "introduced": "18.04"
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                  {
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                "source": "CPE_STRING"
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                    "introduced": "10.0"
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                ],
                "source": "CPE_STRING"
              }
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          {
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              "cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.4:*:*:*:*:*:*:*"
            ],
            "vendor_product": "redhat:jboss_enterprise_application_platform",
            "extracted_events": [
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                "range": [
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                    "introduced": "7.2"
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                  {
                    "introduced": "7.3"
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                  {
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                  {
                    "introduced": "7.4"
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                  {
                    "last_affected": "7.4"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
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        ]
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    },
    "related_cves": [
      {
        "value": "CVE-2019-16869",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382685,
  "published_at": "2019-09-26T16:15:11.69+00:00"
}