CVE-2026-22815: AIOHTTP: Uncapped memory usage possible through aiohttp allowing unlimited trailer headers

Published Apr 1, 2026
·
Updated

### Summary Insufficient restrictions in header/trailer handling could cause uncapped memory usage. ### Impact An application could cause memory exhaustion when receiving an attacker controlled request or response. A vulnerable web application could mitigate these risks with a typical reverse proxy configuration. ----- Patch: https://github.com/aio-libs/aiohttp/commit/0c2e9da51126238a421568eb7c5b53e5b5d17b36

Affected Software

2 affected componentsFixes available
pip/aiohttp<=3.13.3
3.13.4
aiohttp aiohttp<3.13.4

Remediation

Patch Available

https://github.com/aio-libs/aiohttp/commit/0c2e9da51126238a421568eb7c5b53e5b5d17b36

Patch Available

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-w2fm-2cpv-w7v5

Event History

Apr 1, 2026
Advisory Published
via GitHub·07:45 PM
Data Sourced
via GitHub·07:45 PM
DescriptionWeaknessAffected Software
CVE Published
via MITRE·08:08 PM
Data Sourced
via MITRE·08:08 PM
DescriptionWeakness
Data Sourced
via NVD·09:16 PM
RemedyDescriptionSeverityWeaknessAffected Software
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