BREW-BEETS-CVE-2026-42052 (CVE-2026-42052)

Vulnerability from osv_homebrew – Published: 2026-08-13 16:37 – Updated: 2026-09-19 08:48 – Source website
VLAI
Summary
beets is Vulnerable to XSS
Details

Beets is the media library management system. Prior to version 2.10.0, the bundled web UI uses Underscore template interpolation mode <%= ... %> for untrusted metadata fields. In this runtime, <%= ... %> is raw insertion and HTML escaping is only performed by <%- ... %>. Rendered output is then inserted with .html(...), allowing attacker-controlled markup to become active DOM. This issue has been patched in version 2.10.0.

Severity
6.0 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "upstream_fixed_in": "2.10.0"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "beets",
        "purl": "pkg:brew/beets"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.13.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "git",
    "upstream_evidence": [
      {
        "ecosystem": "GIT",
        "key": "https://github.com/beetbox/beets",
        "name": "https://github.com/beetbox/beets",
        "strategy": "git",
        "subject_version": "2.14.1"
      },
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/beets@2.14.1",
        "name": "beets",
        "strategy": "registry",
        "subject_version": "2.14.1"
      },
      {
        "ecosystem": "Debian",
        "key": "Debian/beets",
        "name": "beets",
        "strategy": "distro"
      },
      {
        "ecosystem": "GIT",
        "key": "upstream:https://github.com/beetbox/beets",
        "name": "https://github.com/beetbox/beets",
        "strategy": "distro",
        "subject_version": "2.14.1"
      },
      {
        "ecosystem": "PyPI",
        "key": "upstream:pkg:pypi/beets@2.14.1",
        "name": "beets",
        "strategy": "distro",
        "subject_version": "2.14.1"
      },
      {
        "ecosystem": "Ubuntu",
        "key": "Ubuntu/beets",
        "name": "beets",
        "strategy": "distro"
      }
    ]
  },
  "details": "Beets is the media library management system. Prior to version 2.10.0, the bundled web UI uses Underscore template interpolation mode \u003c%= ... %\u003e for untrusted metadata fields. In this runtime, \u003c%= ... %\u003e is raw insertion and HTML escaping is only performed by \u003c%- ... %\u003e. Rendered output is then inserted with .html(...), allowing attacker-controlled markup to become active DOM. This issue has been patched in version 2.10.0.",
  "id": "BREW-beets-CVE-2026-42052",
  "modified": "2026-09-19T08:48:28Z",
  "published": "2026-08-13T16:37:11Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/beetbox/beets/releases/tag/v2.10.0"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2026/06/msg00030.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42052.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/beetbox/beets/security/advisories/GHSA-3gxm-wfjx-m847"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42052"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "beets is Vulnerable to XSS",
  "upstream": [
    "CVE-2026-42052",
    "GHSA-3gxm-wfjx-m847",
    "PYSEC-2026-2397"
  ]
}



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