[pkg-vuln] CVE-2026-59881 in aiohttp@3.14.1 #585

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kert · 2026-08-04T06:01:20Z

kert commented

2026-08-04 06:01:20 +00:00

Severity: MEDIUM
Package: aiohttp @ 3.14.1
Fixed in: 3.14.2

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.2, the WebSocket client accepts and decompresses frames with the RSV1 bit set even when the permessage-deflate extension was not negotiated, allowing a malicious server to cause unexpected CPU and memory consumption. This issue is fixed in version 3.14.2.

Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-59881

**Severity:** MEDIUM **Package:** `aiohttp` @ `3.14.1` **Fixed in:** `3.14.2` AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.2, the WebSocket client accepts and decompresses frames with the RSV1 bit set even when the permessage-deflate extension was not negotiated, allowing a malicious server to cause unexpected CPU and memory consumption. This issue is fixed in version 3.14.2. **Reference:** https://nvd.nist.gov/vuln/detail/CVE-2026-59881

kert added this to the P21: Package Supply Chain — inventory, mirrors, drift, vuln scanning milestone 2026-08-04 06:01:20 +00:00

kert added the quality ci labels 2026-08-04 06:01:20 +00:00

kert commented

2026-08-13 00:36:17 +00:00

aiohttp 3.14.1→3.14.3 (fix landed in 3.14.2). CVE-2026-59881 (WS client decompresses RSV1 frames without negotiated permessage-deflate): we run no aiohttp WebSocket clients against untrusted servers (aiohttp is storage-client only here); not reachable, fixed anyway.

Verification: bumped in commit 611a1d6 (pyproject floor raised for the direct dep; transitive pins via uv lock -P; pkg-manifest regenerated). Full test suite green with the bumped packages installed: 14,023 passed / 1 skipped (serial proof run 26m45s, then the commit hook's parallel run 13m58s). tests/api (the JWT/crypto surface) 335 passed post-bump.

aiohttp 3.14.1→3.14.3 (fix landed in 3.14.2). CVE-2026-59881 (WS client decompresses RSV1 frames without negotiated permessage-deflate): we run no aiohttp WebSocket clients against untrusted servers (aiohttp is storage-client only here); not reachable, fixed anyway. **Verification:** bumped in commit 611a1d6 (pyproject floor raised for the direct dep; transitive pins via `uv lock -P`; pkg-manifest regenerated). Full test suite green with the bumped packages installed: 14,023 passed / 1 skipped (serial proof run 26m45s, then the commit hook's parallel run 13m58s). `tests/api` (the JWT/crypto surface) 335 passed post-bump.

kert closed this issue

2026-08-13 00:36:17 +00:00

kert referenced this issue

2026-08-13 23:42:54 +00:00

[pkg-vuln] CVE-2026-59881 in aiohttp@3.14.1 #601

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Reference: homelab/stack#585