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Description

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.

PUBLISHED Reserved 2026-04-23 | Published 2026-05-04 | Updated 2026-05-05 | Assigner GitHub_M




MEDIUM: 6.0CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

< 2.10.0
affected

References

github.com/.../beets/security/advisories/GHSA-3gxm-wfjx-m847

github.com/beetbox/beets/releases/tag/v2.10.0

cve.org (CVE-2026-42052)

nvd.nist.gov (CVE-2026-42052)

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