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PYSEC-2026-1097

AIOHTTP vulnerable to brute-force leak of internal static ﬁle path components

Quick fix

PYSEC-2026-1097 — aiohttp: upgrade to the fixed version with the command below.

pip install --upgrade 'aiohttp>=3.13.3'

Details

### Summary Path normalization for static files prevents path traversal, but opens up the ability for an attacker to ascertain the existence of absolute path components.

### Impact If an application uses `web.static()` (not recommended for production deployments), it may be possible for an attacker to ascertain the existence of path components.

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Patch: https://github.com/aio-libs/aiohttp/commit/f2a86fd5ac0383000d1715afddfa704413f0711e

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/aiohttp

Introduced in: 0Fixed in: 3.13.3

Fixpip install --upgrade 'aiohttp>=3.13.3'

References

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-54jq-c3m8-4m76[WEB]
https://nvd.nist.gov/vuln/detail/CVE-2025-69226[ADVISORY]
https://github.com/aio-libs/aiohttp/commit/f2a86fd5ac0383000d1715afddfa704413f0711e[FIX]
https://github.com/aio-libs/aiohttp[PACKAGE]
https://pypi.org/project/aiohttp[PACKAGE]
https://github.com/advisories/GHSA-54jq-c3m8-4m76[ADVISORY]