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BREW-AIRSHARE-CVE-2024-27306 (GHSA-7GPW-8WMC-PM8G)

Vulnerability from osv_homebrew – Published: 2026-08-13 16:35 – Updated: 2026-09-17 19:58 – Source website
VLAI
Summary
aiohttp Cross-site Scripting vulnerability on index pages for static file handling
Details

Summary

A XSS vulnerability exists on index pages for static file handling.

Details

When using web.static(..., show_index=True), the resulting index pages do not escape file names.

If users can upload files with arbitrary filenames to the static directory, the server is vulnerable to XSS attacks.

Workaround

We have always recommended using a reverse proxy server (e.g. nginx) for serving static files. Users following the recommendation are unaffected.

Other users can disable show_index if unable to upgrade.

Patch: https://github.com/aio-libs/aiohttp/pull/8319/files

Severity
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "resource": "aiohttp",
        "resource_purl": "pkg:pypi/aiohttp@3.14.3",
        "upstream_fixed_in": "3.9.4"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "airshare",
        "purl": "pkg:brew/airshare"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.1.5"
            },
            {
              "fixed": "0.1.6_9"
            }
          ],
          "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\nA XSS vulnerability exists on index pages for static file handling.\n\n### Details\n\nWhen using `web.static(..., show_index=True)`, the resulting index pages do not escape file names.\n\nIf users can upload files with arbitrary filenames to the static directory, the server is vulnerable to XSS attacks.\n\n### Workaround\n\nWe have always recommended using a reverse proxy server (e.g. nginx) for serving static files. Users following the recommendation are unaffected.\n\nOther users can disable `show_index` if unable to upgrade.\n\n-----\n\nPatch: https://github.com/aio-libs/aiohttp/pull/8319/files",
  "id": "BREW-airshare-CVE-2024-27306",
  "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-7gpw-8wmc-pm8g"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-27306"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/pull/8319"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/pull/8319/files"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/commit/28335525d1eac015a7e7584137678cbb6ff19397"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/aio-libs/aiohttp"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/02/msg00002.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2EXRGTN2WG7VZLUZ7WOXU5GQJKCPPHKP"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NWEI6NIHZ3G7DURDZVMRK7ZEFC2BTD3U"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZIVBMPEY7WWOFMC3CWXFBRQPFECV4SW3"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "aiohttp Cross-site Scripting vulnerability on index pages for static file handling",
  "upstream": [
    "GHSA-7gpw-8wmc-pm8g",
    "CVE-2024-27306",
    "PYSEC-2026-1102"
  ]
}



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