PT-2026-36877 · Beets · Beets

Forimoc + 1 · Published 2026-04-29 · Updated 2026-05-27 · CVE-2026-42052

Positive Technologies (AI Summary)

CVSS v4.0

6.0

Medium

Base vector

AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions Beets versions prior to 2.10.0

Description The bundled web UI uses Underscore template interpolation mode <%= ... %> for untrusted metadata fields. In this runtime, <%= ... %> performs raw insertion, whereas HTML escaping is only handled by <%- ... %>. The rendered output is then inserted using .html(...), which allows attacker-controlled markup to become active DOM, leading to Cross-Site Scripting (XSS), a condition where malicious scripts are injected into trusted websites.

Recommendations Update to version 2.10.0.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-42052

GHSA-3GXM-WFJX-M847

OPENSUSE-SU-2026:10865-1

Affected Products

Beets

References · 14

• https://ubuntu.com/security/CVE-2026-42052 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42052 · Security Note
• https://osv.dev/vulnerability/GHSA-3gxm-wfjx-m847 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-42052 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10865-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-42052 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-42052 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-42052 · Vendor Advisory
• https://github.com/beetbox/beets/security/advisories/GHSA-3gxm-wfjx-m847 · Note
• https://github.com/beetbox/beets · Note
• https://github.com/beetbox/beets/releases/tag/v2.10.0 · Note
• https://twitter.com/CVEnew/status/2051361268099912161 · Twitter Post
• https://suse.com/security/cve/CVE-2026-42052 · Note
• https://twitter.com/VulmonFeeds/status/2051398533534638082 · Twitter Post