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AIOHTTP: WebSocket client accepts compressed frames without negotiated permessage-deflate
AIOHTTP: WebSocket client accepts compressed frames without negotiated permessage-deflate
Affected packages
- aiohttp— before 3.14.2
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- 0.30%
- EPSS percentile
- 22.5%
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs. This advisory is in the top 22%.
Sources
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-mq44-7p77-q5h7
- https://nvd.nist.gov/vuln/detail/CVE-2026-59881
- https://github.com/aio-libs/aiohttp/pull/12978
- https://github.com/aio-libs/aiohttp/commit/47fb6ae354d4fa22048f4dbe7dbf82b625f0a2f6
- https://github.com/aio-libs/aiohttp
- http://github.com/aio-libs/aiohttp/releases/tag/v3.14.2
Structured record: https://osv.dev/vulnerability/GHSA-mq44-7p77-q5h7
Recommended response stack
Snyk — Scan your dependencies in CI and fix this vulnerability.→Socket — Detect malicious and compromised packages before they ship.→
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