ubuntu-cve-2026-27135
Vulnerability from osv_ubuntu
Published
2026-03-18 18:16
Modified
2026-06-30 16:19
Summary
Details

nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API nghttp2_session_terminate_session or nghttp2_session_terminate_session2 is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libnghttp2-14",
            "binary_version": "1.7.1-1ubuntu0.1~esm3"
          },
          {
            "binary_name": "nghttp2",
            "binary_version": "1.7.1-1ubuntu0.1~esm3"
          },
          {
            "binary_name": "nghttp2-client",
            "binary_version": "1.7.1-1ubuntu0.1~esm3"
          },
          {
            "binary_name": "nghttp2-proxy",
            "binary_version": "1.7.1-1ubuntu0.1~esm3"
          },
          {
            "binary_name": "nghttp2-server",
            "binary_version": "1.7.1-1ubuntu0.1~esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "nghttp2",
        "purl": "pkg:deb/ubuntu/nghttp2@1.7.1-1ubuntu0.1~esm3?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.7.1-1ubuntu0.1~esm3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.6.7-1",
        "1.3.4-2",
        "1.4.0-1",
        "1.4.0-2",
        "1.5.0-2",
        "1.6.0-1",
        "1.7.0-1",
        "1.7.1-1",
        "1.7.1-1ubuntu0.1~esm1",
        "1.7.1-1ubuntu0.1~esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libnghttp2-14",
            "binary_version": "1.30.0-1ubuntu1+esm3"
          },
          {
            "binary_name": "nghttp2",
            "binary_version": "1.30.0-1ubuntu1+esm3"
          },
          {
            "binary_name": "nghttp2-client",
            "binary_version": "1.30.0-1ubuntu1+esm3"
          },
          {
            "binary_name": "nghttp2-proxy",
            "binary_version": "1.30.0-1ubuntu1+esm3"
          },
          {
            "binary_name": "nghttp2-server",
            "binary_version": "1.30.0-1ubuntu1+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "nghttp2",
        "purl": "pkg:deb/ubuntu/nghttp2@1.30.0-1ubuntu1+esm3?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.30.0-1ubuntu1+esm3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.25.0-1",
        "1.27.0-1",
        "1.28.0-1",
        "1.29.0-1",
        "1.29.0-1build1",
        "1.30.0-1",
        "1.30.0-1ubuntu1",
        "1.30.0-1ubuntu1+esm1",
        "1.30.0-1ubuntu1+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libnghttp2-14",
            "binary_version": "1.40.0-1ubuntu0.3+esm1"
          },
          {
            "binary_name": "nghttp2",
            "binary_version": "1.40.0-1ubuntu0.3+esm1"
          },
          {
            "binary_name": "nghttp2-client",
            "binary_version": "1.40.0-1ubuntu0.3+esm1"
          },
          {
            "binary_name": "nghttp2-proxy",
            "binary_version": "1.40.0-1ubuntu0.3+esm1"
          },
          {
            "binary_name": "nghttp2-server",
            "binary_version": "1.40.0-1ubuntu0.3+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "nghttp2",
        "purl": "pkg:deb/ubuntu/nghttp2@1.40.0-1ubuntu0.3+esm1?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.40.0-1ubuntu0.3+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.39.2-1",
        "1.40.0-1",
        "1.40.0-1build1",
        "1.40.0-1ubuntu0.1",
        "1.40.0-1ubuntu0.2",
        "1.40.0-1ubuntu0.3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnghttp2-14",
            "binary_version": "1.43.0-1ubuntu0.3"
          },
          {
            "binary_name": "nghttp2",
            "binary_version": "1.43.0-1ubuntu0.3"
          },
          {
            "binary_name": "nghttp2-client",
            "binary_version": "1.43.0-1ubuntu0.3"
          },
          {
            "binary_name": "nghttp2-proxy",
            "binary_version": "1.43.0-1ubuntu0.3"
          },
          {
            "binary_name": "nghttp2-server",
            "binary_version": "1.43.0-1ubuntu0.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "nghttp2",
        "purl": "pkg:deb/ubuntu/nghttp2@1.43.0-1ubuntu0.3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.43.0-1ubuntu0.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.43.0-1",
        "1.43.0-1build1",
        "1.43.0-1build2",
        "1.43.0-1build3",
        "1.43.0-1ubuntu0.1",
        "1.43.0-1ubuntu0.2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnghttp2-14",
            "binary_version": "1.59.0-1ubuntu0.3"
          },
          {
            "binary_name": "nghttp2",
            "binary_version": "1.59.0-1ubuntu0.3"
          },
          {
            "binary_name": "nghttp2-client",
            "binary_version": "1.59.0-1ubuntu0.3"
          },
          {
            "binary_name": "nghttp2-proxy",
            "binary_version": "1.59.0-1ubuntu0.3"
          },
          {
            "binary_name": "nghttp2-server",
            "binary_version": "1.59.0-1ubuntu0.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "nghttp2",
        "purl": "pkg:deb/ubuntu/nghttp2@1.59.0-1ubuntu0.3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.59.0-1ubuntu0.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.55.1-1",
        "1.57.0-1",
        "1.58.0-1",
        "1.59.0-1",
        "1.59.0-1build1",
        "1.59.0-1build2",
        "1.59.0-1build4",
        "1.59.0-1ubuntu0.1",
        "1.59.0-1ubuntu0.2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnghttp2-14",
            "binary_version": "1.64.0-1.1ubuntu1.1"
          },
          {
            "binary_name": "nghttp2",
            "binary_version": "1.64.0-1.1ubuntu1.1"
          },
          {
            "binary_name": "nghttp2-client",
            "binary_version": "1.64.0-1.1ubuntu1.1"
          },
          {
            "binary_name": "nghttp2-proxy",
            "binary_version": "1.64.0-1.1ubuntu1.1"
          },
          {
            "binary_name": "nghttp2-server",
            "binary_version": "1.64.0-1.1ubuntu1.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "nghttp2",
        "purl": "pkg:deb/ubuntu/nghttp2@1.64.0-1.1ubuntu1.1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.64.0-1.1ubuntu1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.64.0-1ubuntu1",
        "1.64.0-1.1",
        "1.64.0-1.1build1",
        "1.64.0-1.1ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnghttp2-14",
            "binary_version": "1.68.0-2ubuntu0.1"
          },
          {
            "binary_name": "nghttp2",
            "binary_version": "1.68.0-2ubuntu0.1"
          },
          {
            "binary_name": "nghttp2-client",
            "binary_version": "1.68.0-2ubuntu0.1"
          },
          {
            "binary_name": "nghttp2-proxy",
            "binary_version": "1.68.0-2ubuntu0.1"
          },
          {
            "binary_name": "nghttp2-server",
            "binary_version": "1.68.0-2ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "nghttp2",
        "purl": "pkg:deb/ubuntu/nghttp2@1.68.0-2ubuntu0.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.68.0-2ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.64.0-1.1ubuntu1",
        "1.64.0-1.1ubuntu2",
        "1.68.0-1",
        "1.68.0-2"
      ]
    }
  ],
  "aliases": [],
  "details": "nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.",
  "id": "UBUNTU-CVE-2026-27135",
  "modified": "2026-06-30T16:19:40Z",
  "published": "2026-03-18T18:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-27135"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-27135"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/nghttp2/nghttp2/security/advisories/GHSA-6933-cjhr-5qg6"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8233-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8233-2"
    }
  ],
  "related": [
    "USN-8233-1",
    "USN-8233-2"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-27135"
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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Detection rules are retrieved from Rulezet.