Is aiohttp affected by CVE-2026-54278?

PyPI aiohttp is affected in <3.14.1.

Is CVE-2026-54278 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.4%.

medium

CVE-2026-54278

Q: Is CVE-2026-54278 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.4%.

PyPI · aiohttp

Summary

aiohttp: Unread Compressed Request Bodies Bypass client_max_size During Cleanup

Severity: medium
EPSS: 0.4% (p33)
Also known as: GHSA-g3cq-j2xw-wf74
Published: 2026-06-15

References

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

Related advisories

CVE-2026-69244 — high · PyPI/aiohttp
CVE-2025-69223 — high · PyPI/aiohttp
CVE-2026-69243 — medium · PyPI/aiohttp
CVE-2026-59881 — medium · PyPI/aiohttp
CVE-2026-54274 — medium · PyPI/aiohttp
CVE-2026-54273 — medium · PyPI/aiohttp
CVE-2026-54277 — medium · PyPI/aiohttp
CVE-2026-54276 — medium · PyPI/aiohttp

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.