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.

The remote openSUSE 16 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2026:21383-1 advisory.

    Changes in beets:

    - CVE-2026-42052: Prior to version 2.10.0, the bundled web UI uses Underscore       template interpolation mode <%= ... %> for untrusted metadata fields. (boo#1263988)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4641 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-4641-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                       Emmanuel Arias     June 23, 2026                                 https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : beets     Version        : 1.4.9-7+deb11u1     CVE ID         : CVE-2026-42052     Debian Bug     : 1135779

    It was discovered that beets, a media library management system, is     vulnerable to run arbitrary JavaScript code in the victim browser,     exfiltrate viewable data, and perform UI-driven actions as the victim     session.

    For Debian 11 bullseye, this problem has been fixed in version     1.4.9-7+deb11u1.

    We recommend that you upgrade your beets packages.

    For the detailed security status of beets please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/beets

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-42052)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-42052)

ID	Name	Product	Family	Severity
328921	openSUSE 16 Security Update : beets (openSUSE-SU-2026:21383-1)	Nessus	SuSE Local Security Checks	medium
322323	Debian dla-4641 : beets - security update	Nessus	Debian Local Security Checks	medium
312217	Linux Distros Unpatched Vulnerability : CVE-2026-42052	Nessus	Misc.	medium
440967	SCA: security update for beets (GHSA-3gxm-wfjx-m847)	Tenable Cloud Security	SCA Checks	medium
440967	SCA: security update for beets (GHSA-3gxm-wfjx-m847)	Tenable Self-Hosted Container Security	SCA Checks	medium

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CVE-2026-42052

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