How severe is CVE-2026-42052?

CVE-2026-42052 has a CVSS 4.0 base score of 6.0, rated medium severity.

Is CVE-2026-42052 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-42052?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-42052 have an EU (EUVD) identifier?

Yes. CVE-2026-42052 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27055.

When was CVE-2026-42052 published?

CVE-2026-42052 was published on 2026-05-04 and last updated on 2026-06-23.

CVE-2026-42052

CVE-2026-42052 is a medium-severity vulnerability with a CVSS 4.0 base score of 6.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 4.0 base score 6.0)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-27055
Weakness: CWE-79
Published: 2026-05-04
Last modified: 2026-06-23

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.

Frequently asked questions

What is CVE-2026-42052?: 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.
How severe is CVE-2026-42052?: CVE-2026-42052 has a CVSS 4.0 base score of 6.0, rated medium severity.
Is CVE-2026-42052 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-42052?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42052 have an EU (EUVD) identifier?: Yes. CVE-2026-42052 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27055.
When was CVE-2026-42052 published?: CVE-2026-42052 was published on 2026-05-04 and last updated on 2026-06-23.

References

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