AIOHTTP: Out-of-bounds heap read in C HTTP response parser error path (malformed chunked response)
### 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
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-69244US | — | — | ||
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.3, an out-of-bounds heap read could occur in the C response parser while building an e… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/advisories/GHSA-cq5v-8q36-5273ADVISORY
- https://github.com/aio-libs/aiohttpPACKAGE
- https://github.com/aio-libs/aiohttp/commit/49f65d54150397892f7bcc4aae887767d51c322dWEB
- https://github.com/aio-libs/aiohttp/pull/13223WEB
- https://github.com/aio-libs/aiohttp/releases/tag/v3.14.3WEB
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-cq5v-8q36-5273WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-69244ADVISORY
- https://pypi.org/project/aiohttpPACKAGE
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