CVE-2026-26379

State: Published
Severity: 6.5 Medium
Published: Jun 3, 2026
Updated: Jun 4, 2026
Reserved: Feb 16, 2026

Description

Koha versions up to 25.11 contain a Server-Side Request Forgery (SSRF) vulnerability via the Z39.50/SRU server configuration. This allows authenticated attackers to perform internal network scanning and identify running services by analyzing server response times.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N	CISA-ADP

Weaknesses

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
n/an/a	n/aAffected

References

https://github.com/Koha-Community/Koha
https://g03m0n.github.io/
https://g03m0n.github.io/posts/cve-2026-26379/

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