AIOHTTP has unicode match groups in regexes for ASCII protocol elements

GHSA-mqqc-3gqh-h2x8 · CVE-2025-69225 · PYSEC-2026-1109

Published Jan 5, 2026 · Modified Sep 10, 2026

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Description

Summary

The parser allows non-ASCII decimals to be present in the Range header.

Impact

There is no known impact, but there is the possibility that there's a method to exploit a request smuggling vulnerability.

Patch: https://github.com/aio-libs/aiohttp/commit/c7b7a044f88c71cefda95ec75cdcfaa4792b3b96

References

WEB https://github.com/aio-libs/aiohttp/security/advisories/GHSA-mqqc-3gqh-h2x8
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-69225
WEB https://github.com/aio-libs/aiohttp/commit/c7b7a044f88c71cefda95ec75cdcfaa4792b3b96
PACKAGE https://github.com/aio-libs/aiohttp

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