id: PYSEC-2026-2097
published: "2026-04-01T21:16:59.570Z"
modified: "2026-07-13T05:47:32.742507Z"
aliases:
- CVE-2026-34515
- GHSA-p998-jp59-783m
details: 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.
affected:
- package:
    name: aiohttp
    ecosystem: PyPI
    purl: pkg:pypi/aiohttp
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: "0"
    - fixed: 3.13.4
  versions:
  - "0.1"
  - 0.10.0
  - 0.10.1
  - 0.10.2
  - 0.11.0
  - 0.12.0
  - 0.13.0
  - 0.13.1
  - 0.14.0
  - 0.14.1
  - 0.14.2
  - 0.14.3
  - 0.14.4
  - 0.15.0
  - 0.15.1
  - 0.15.2
  - 0.15.3
  - 0.16.0
  - 0.16.1
  - 0.16.2
  - 0.16.3
  - 0.16.4
  - 0.16.5
  - 0.16.6
  - 0.17.0
  - 0.17.1
  - 0.17.2
  - 0.17.3
  - 0.17.4
  - 0.18.0
  - 0.18.1
  - 0.18.2
  - 0.18.3
  - 0.18.4
  - 0.19.0
  - "0.2"
  - 0.20.0
  - 0.20.1
  - 0.20.2
  - 0.21.0
  - 0.21.1
  - 0.21.2
  - 0.21.4
  - 0.21.5
  - 0.21.6
  - 0.22.0
  - 0.22.0a0
  - 0.22.0b0
  - 0.22.0b1
  - 0.22.0b2
  - 0.22.0b3
  - 0.22.0b4
  - 0.22.0b5
  - 0.22.0b6
  - 0.22.1
  - 0.22.2
  - 0.22.3
  - 0.22.4
  - 0.22.5
  - "0.3"
  - "0.4"
  - 0.4.1
  - 0.4.2
  - 0.4.3
  - 0.4.4
  - 0.5.0
  - 0.6.0
  - 0.6.1
  - 0.6.2
  - 0.6.3
  - 0.6.4
  - 0.6.5
  - 0.7.0
  - 0.7.1
  - 0.7.2
  - 0.7.3
  - 0.8.0
  - 0.8.1
  - 0.8.2
  - 0.8.3
  - 0.8.4
  - 0.9.0
  - 0.9.1
  - 0.9.2
  - 0.9.3
  - 1.0.0
  - 1.0.1
  - 1.0.2
  - 1.0.3
  - 1.0.5
  - 1.1.0
  - 1.1.1
  - 1.1.2
  - 1.1.3
  - 1.1.4
  - 1.1.5
  - 1.1.6
  - 1.2.0
  - 1.3.0
  - 1.3.1
  - 1.3.2
  - 1.3.3
  - 1.3.4
  - 1.3.5
  - 2.0.0
  - 2.0.0rc1
  - 2.0.1
  - 2.0.2
  - 2.0.3
  - 2.0.4
  - 2.0.5
  - 2.0.6
  - 2.0.7
  - 2.1.0
  - 2.2.0
  - 2.2.1
  - 2.2.2
  - 2.2.3
  - 2.2.4
  - 2.2.5
  - 2.3.0
  - 2.3.0a1
  - 2.3.0a2
  - 2.3.0a3
  - 2.3.0a4
  - 2.3.1
  - 2.3.10
  - 2.3.1a1
  - 2.3.2
  - 2.3.2b2
  - 2.3.2b3
  - 2.3.3
  - 2.3.4
  - 2.3.5
  - 2.3.6
  - 2.3.7
  - 2.3.8
  - 2.3.9
  - 3.0.0
  - 3.0.0b0
  - 3.0.0b1
  - 3.0.0b2
  - 3.0.0b3
  - 3.0.0b4
  - 3.0.1
  - 3.0.2
  - 3.0.3
  - 3.0.4
  - 3.0.5
  - 3.0.6
  - 3.0.7
  - 3.0.8
  - 3.0.9
  - 3.1.0
  - 3.1.1
  - 3.1.2
  - 3.1.3
  - 3.10.0
  - 3.10.0b1
  - 3.10.0rc0
  - 3.10.1
  - 3.10.10
  - 3.10.11
  - 3.10.11rc0
  - 3.10.2
  - 3.10.3
  - 3.10.4
  - 3.10.5
  - 3.10.6
  - 3.10.6rc0
  - 3.10.6rc1
  - 3.10.6rc2
  - 3.10.7
  - 3.10.8
  - 3.10.9
  - 3.11.0
  - 3.11.0b0
  - 3.11.0b1
  - 3.11.0b2
  - 3.11.0b3
  - 3.11.0b4
  - 3.11.0b5
  - 3.11.0rc0
  - 3.11.0rc1
  - 3.11.0rc2
  - 3.11.1
  - 3.11.10
  - 3.11.11
  - 3.11.12
  - 3.11.13
  - 3.11.14
  - 3.11.15
  - 3.11.16
  - 3.11.17
  - 3.11.18
  - 3.11.2
  - 3.11.3
  - 3.11.4
  - 3.11.5
  - 3.11.6
  - 3.11.7
  - 3.11.8
  - 3.11.9
  - 3.12.0
  - 3.12.0b0
  - 3.12.0b1
  - 3.12.0b2
  - 3.12.0b3
  - 3.12.0rc0
  - 3.12.0rc1
  - 3.12.1
  - 3.12.10
  - 3.12.11
  - 3.12.12
  - 3.12.13
  - 3.12.14
  - 3.12.15
  - 3.12.1rc0
  - 3.12.2
  - 3.12.3
  - 3.12.4
  - 3.12.6
  - 3.12.7
  - 3.12.7rc0
  - 3.12.8
  - 3.12.9
  - 3.13.0
  - 3.13.1
  - 3.13.2
  - 3.13.3
  - 3.2.0
  - 3.2.1
  - 3.3.0
  - 3.3.0a0
  - 3.3.1
  - 3.3.2
  - 3.3.2a0
  - 3.4.0
  - 3.4.0a0
  - 3.4.0a3
  - 3.4.0b1
  - 3.4.0b2
  - 3.4.1
  - 3.4.2
  - 3.4.3
  - 3.4.4
  - 3.5.0
  - 3.5.0a1
  - 3.5.0b1
  - 3.5.0b2
  - 3.5.0b3
  - 3.5.1
  - 3.5.2
  - 3.5.3
  - 3.5.4
  - 3.6.0
  - 3.6.0a0
  - 3.6.0a1
  - 3.6.0a11
  - 3.6.0a12
  - 3.6.0a2
  - 3.6.0a3
  - 3.6.0a4
  - 3.6.0a5
  - 3.6.0a6
  - 3.6.0a7
  - 3.6.0a8
  - 3.6.0a9
  - 3.6.0b0
  - 3.6.1
  - 3.6.1b3
  - 3.6.1b4
  - 3.6.2
  - 3.6.2a0
  - 3.6.2a1
  - 3.6.2a2
  - 3.6.3
  - 3.7.0
  - 3.7.0b0
  - 3.7.0b1
  - 3.7.1
  - 3.7.2
  - 3.7.3
  - 3.7.4
  - 3.7.4.post0
  - 3.8.0
  - 3.8.0a7
  - 3.8.0b0
  - 3.8.1
  - 3.8.2
  - 3.8.3
  - 3.8.4
  - 3.8.5
  - 3.8.6
  - 3.9.0
  - 3.9.0b0
  - 3.9.0b1
  - 3.9.0rc0
  - 3.9.1
  - 3.9.2
  - 3.9.3
  - 3.9.4
  - 3.9.4rc0
  - 3.9.5
  ecosystem_specific: {}
references:
- type: ADVISORY
  url: https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4
- type: FIX
  url: https://github.com/aio-libs/aiohttp/commit/0ae2aa076c84573df83fc1fdc39eec0f5862fe3d
- type: FIX
  url: https://github.com/aio-libs/aiohttp/security/advisories/GHSA-p998-jp59-783m
severity:
- type: CVSS_V3
  score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N