BREW-AIRSHARE-CVE-2026-50269 (GHSA-M6QW-4CW2-HM4M)

Vulnerability from osv_homebrew – Published: 2026-08-13 16:35 – Updated: 2026-09-17 19:58 – Source website
VLAI
Summary
aiohttp: CRLF injection in multipart headers
Details

Summary

Attacker-controlled input included into multipart/payload headers can be used to modify a request to inject additional headers or similar.

Impact

In the unlikely situation that an application is passing user-controlled strings into MultipartWriter.append(headers=...) or Payload.headers, then an attacker may be able to modify the request to inject headers or change the contents of the request.

Workaround

Sanitise such user input.

Patch: https://github.com/aio-libs/aiohttp/commit/bf88077ebb14f4c29924b8e8904cba20c55c28b8

Severity
2.7 (Low)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "resource": "aiohttp",
        "resource_purl": "pkg:pypi/aiohttp@3.14.3",
        "upstream_fixed_in": "3.14.0"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "airshare",
        "purl": "pkg:brew/airshare"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.1.5"
            },
            {
              "fixed": "0.1.6_24"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/aiohttp@3.14.3",
        "name": "aiohttp",
        "resource": "aiohttp",
        "strategy": "registry",
        "subject_version": "3.14.3"
      }
    ]
  },
  "details": "### Summary\n\nAttacker-controlled input included into multipart/payload headers can be used to modify a request to inject additional headers or similar.\n\n### Impact\n\nIn the unlikely situation that an application is passing user-controlled strings into `MultipartWriter.append(headers=...)` or `Payload.headers`, then an attacker may be able to modify the request to inject headers or change the contents of the request.\n\n### Workaround\n\nSanitise such user input.\n\n-----\n\nPatch: https://github.com/aio-libs/aiohttp/commit/bf88077ebb14f4c29924b8e8904cba20c55c28b8",
  "id": "BREW-airshare-CVE-2026-50269",
  "modified": "2026-09-17T19:58:50Z",
  "published": "2026-08-13T16:35:13Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-m6qw-4cw2-hm4m"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/commit/bf88077ebb14f4c29924b8e8904cba20c55c28b8"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/aio-libs/aiohttp"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "aiohttp: CRLF injection in multipart headers",
  "upstream": [
    "GHSA-m6qw-4cw2-hm4m",
    "CVE-2026-50269",
    "PYSEC-2026-2106"
  ]
}



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