# CVE-2026-42052: beets: Beets is the media library management system

CVE-2026-42052 is fixed in beets on 1 platform, first by beets 1.4.6-2ubuntu0.1~esm1, released May 4, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-42052
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0030
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 4, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | beets Debian 12.15 (bookworm) | 1.6.0-4+deb12u1 | [DEBIAN-CVE-2026-42052](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42052.md) | May 4, 2026 |
| Linux | beets Debian 13.5 (trixie) | 2.2.0-3+deb13u1 | [DEBIAN-CVE-2026-42052](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42052.md) | May 4, 2026 |
| Linux | beets Debian 14 | 2.11.0-1 | [DEBIAN-CVE-2026-42052](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42052.md) | May 4, 2026 |
| Linux | beets Ubuntu 18.04.6 LTS (bionic) | 1.4.6-2ubuntu0.1~esm1 | [beets 1.4.6-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-beets-1.4.6-2ubuntu0.1-esm1.md) | May 4, 2026 |
| Linux | beets Ubuntu 20.04 LTS (focal) | 1.4.9-4ubuntu0.1~esm1 | [beets 1.4.9-4ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-beets-1.4.9-4ubuntu0.1-esm1.md) | May 4, 2026 |
| Linux | beets Ubuntu 22.04.1 LTS (jammy) | 1.6.0-1ubuntu0.1~esm1 | [beets 1.6.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-beets-1.6.0-1ubuntu0.1-esm1.md) | May 4, 2026 |
| Linux | beets Ubuntu 24.04.5 LTS (noble) | 1.6.0-8ubuntu0.1~esm1 | [beets 1.6.0-8ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-beets-1.6.0-8ubuntu0.1-esm1.md) | May 4, 2026 |
| Linux | beets Ubuntu 26.04.1 LTS (resolute) | 2.5.1-4ubuntu0.1~esm1 | [beets 2.5.1-4ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-beets-2.5.1-4ubuntu0.1-esm1.md) | May 4, 2026 |
| Linux | beets opensuse-leap 16.0 | 2.2.0-bp160.2.1 | [OPENSUSE-SU-2026:21383-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21383-1.md) | Jul 20, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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