GHSA-CQ5V-8Q36-5273

Vulnerability from github – Published: 2026-08-03 20:51 – Updated: 2026-08-03 20:51
VLAI
Summary
AIOHTTP: Out-of-bounds heap read in C HTTP response parser error path (malformed chunked response)
Details

Summary

An out-of-bounds heap read could occur in the C response parser while building an error message for a malformed response.

Impact

An attacker controlled server, or possibly an accidental response could trigger a DoS in the client.

Workaround

If unable to upgrade, the Python parser is unaffected and can be used with AIOHTTP_NO_EXTENSIONS=1.

Patch: https://github.com/aio-libs/aiohttp/commit/49f65d54150397892f7bcc4aae887767d51c322d

Severity
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.14.2"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "aiohttp"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.14.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-69244"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125",
      "CWE-400",
      "CWE-416"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-03T20:51:13Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Summary\n\nAn out-of-bounds heap read could occur in the C response parser while building an error message for a malformed response.\n\n### Impact\n\nAn attacker controlled server, or possibly an accidental response could trigger a DoS in the client.\n\n### Workaround\n\nIf unable to upgrade, the Python parser is unaffected and can be used with `AIOHTTP_NO_EXTENSIONS=1`.\n\n---\n\nPatch: https://github.com/aio-libs/aiohttp/commit/49f65d54150397892f7bcc4aae887767d51c322d",
  "id": "GHSA-cq5v-8q36-5273",
  "modified": "2026-08-03T20:51:13Z",
  "published": "2026-08-03T20:51:13Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-cq5v-8q36-5273"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/pull/13223"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/commit/49f65d54150397892f7bcc4aae887767d51c322d"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/aio-libs/aiohttp"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/releases/tag/v3.14.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "AIOHTTP: Out-of-bounds heap read in C HTTP response parser error path (malformed chunked response)"
}



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