aio-libs/aiohttp · Security
AIOHTTP: Out-of-bounds heap read in C HTTP response parser error path (malformed chunked response)
- GHSA ID
- GHSA-cq5v-8q36-5273
- CVE ID
- CVE-2026-69244
- Severity
- high
- Published
- Updated
- CVSS v4
- 7.1 · 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
Description
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
CWEs
- CWE-125 · Out-of-bounds Read
- CWE-400 · Uncontrolled Resource Consumption
- CWE-416 · Use After Free
References
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-cq5v-8q36-5273 ↗
- https://github.com/aio-libs/aiohttp/pull/13223 ↗
- https://github.com/aio-libs/aiohttp/commit/49f65d54150397892f7bcc4aae887767d51c322d ↗
- https://github.com/aio-libs/aiohttp/releases/tag/v3.14.3 ↗
- https://github.com/advisories/GHSA-cq5v-8q36-5273 ↗