CVE-2026-34515

AIOHTTP: UNC SSRF/NTLMv2 Credential Theft/Local File Read in static resource handler on Windows

State: Published
Severity: 6.6 Medium
Published: Apr 1, 2026
Updated: Apr 2, 2026
Reserved: Mar 30, 2026

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, on Windows the static resource handler may expose information about a NTLMv2 remote path. This issue has been patched in version 3.13.4.

Scores

CVSS	Score	Vector	Source
4.0	6.6 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U	GitHub_M

Weaknesses

CWE-36 Absolute Path Traversal
CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
aiohttpaio-libs	< 3.13.4Affected

References

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-p998-jp59-783m
https://github.com/aio-libs/aiohttp/commit/0ae2aa076c84573df83fc1fdc39eec0f5862fe3d
https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4

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