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Python CVE-2026-34515

| EUVDEUVD-2026-18039 MEDIUM
Absolute Path Traversal (CWE-36)
2026-04-01 GitHub_M GHSA-p998-jp59-783m
Python Information Disclosure Microsoft Red Hat Suse
6.6
CVSS 4.0 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
SUSE
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Red Hat
5.3 MEDIUM
qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

4
Patch released
Apr 02, 2026 - 02:30 nvd
Patch available
EUVD ID Assigned
Apr 01, 2026 - 21:00 euvd
EUVD-2026-18039
Analysis Generated
Apr 01, 2026 - 21:00 vuln.today
CVE Published
Apr 01, 2026 - 20:10 nvd
MEDIUM 6.6

Blast Radius

ecosystem impact
† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth
  • 122 pypi packages depend on aiohttp (43 direct, 79 indirect)

Ecosystem-wide dependent count for version 3.13.4.

DescriptionGitHub Advisory

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.

AnalysisAI

AIOHTTP static resource handler on Windows exposes NTLMv2 remote path information to unauthenticated remote attackers, allowing information disclosure with high confidentiality impact. Versions prior to 3.13.4 are affected. The vulnerability has been patched and no active exploitation has been confirmed at this time.

Technical ContextAI

AIOHTTP is a Python asynchronous HTTP framework built on asyncio. The vulnerability resides in the static resource handler component, which serves static files in response to HTTP requests. On Windows systems, the handler fails to properly sanitize or neutralize path information related to NTLMv2 (NT LAN Manager version 2) authentication credentials or remote path traversal patterns. CWE-36 (Absolute Path Traversal) indicates the root cause involves path normalization failures where absolute paths-particularly UNC paths common in Windows environments-are not properly validated before being exposed in HTTP responses or error messages. This could allow an attacker to infer information about backend authentication schemes or remote resource locations by analyzing handler responses.

RemediationAI

Vendor-released patch: AIOHTTP version 3.13.4 and later. Update AIOHTTP to version 3.13.4 or newer immediately. If immediate patching is not feasible, disable or restrict the static resource handler to serve only trusted, non-sensitive paths on Windows systems, and implement network-level access controls to limit exposure of the HTTP endpoint. Refer to the official security advisory at https://github.com/aio-libs/aiohttp/security/advisories/GHSA-p998-jp59-783m for full remediation guidance and the upstream fix commit at https://github.com/aio-libs/aiohttp/commit/0ae2aa076c84573df83fc1fdc39eec0f5862fe3d.

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Vendor StatusVendor

SUSE

Severity: High
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise Module for Public Cloud 15 SP7 Fixed
SUSE Linux Enterprise Module for Python 3 15 SP7 Fixed
SUSE Linux Enterprise Server 15 SP7 Fixed

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CVE-2026-34515 vulnerability details – vuln.today
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