CVE-2026-69244High· 7.5▾ TwilightAIOHTTP 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 error message for a malformed response. An attacker contro…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.3%
— → 7.5
7.5 → —
— → 7.5
Last analysed / modified upstream
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 error message for a malformed response. An attacker controlled server, or possibly an accidental response, could trigger a DoS in the client. The vulnerable path was error message construction in aiohttp/_http_parser.pyx, where an llhttp error-position pointer was used to build a snippet for malformed chunked responses and malformed request or response bytes at the buffer end. This issue is fixed in version 3.14.3.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
aiohttp <= 3.14.2Patched in:
aiohttp 3.14.3Source: https://github.com/advisories/GHSA-cq5v-8q36-5273
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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