Fluid Attacks Database

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, during cleanup it is possible for a compressed request body to be decompressed into memory in one chunk. An attacker may be able to send a compressed payload in specific situations that could be decompressed into memory, potentially leading to DoS (a zip bomb edge case). This vulnerability is fixed in 3.14.1.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Component	Affected version	Patched versions
pypi	aiohttp	>=0 <3.14.1	3.14.1
debian 14	python-aiohttp	=3.11.16-1 \|\| =3.12.15-1 \|\| =3.13.0-1 \|\| =3.13.1-1 \|\| =3.13.3-1 \|\| =3.13.3-2 \|\| =3.13.3-3 \|\| =3.13.5-1 \|\| =3.14.0-1 \|\| >=0 <3.14.1-1	3.14.1-1
debian 13	python-aiohttp	=3.11.16-1 \|\| =3.11.16-1+deb13u1 \|\| =3.12.15-1 \|\| =3.13.0-1 \|\| =3.13.1-1 \|\| =3.13.3-1 \|\| =3.13.3-2 \|\| =3.13.3-3 \|\| =3.13.5-1 \|\| =3.14.0-1 \|\| =3.14.1-1 \|\| =3.14.1-2 \|\| =3.14.1-3 \|\| =3.14.1-4 \|\| =3.14.1-5 \|\| =3.14.3-1	-

Aliases

1. CVE-2026-542782. NVD-2026-542783. OSV-2026-542784. OSV-DEBIAN-2026-542785. GHSA-g3cq-j2xw-wf746. GCVE-2026-542787. SECURITY-TRACKER-CVE-2026-54278

References

1. https://github.com/aio-libs/aiohttp/security/advisories/GHSA-g3cq-j2xw-wf74

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