CVE-2026-26379

EUVD-2026-34170
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.
SSRF
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 15%
Affected Products (NVD)
VendorProductVersion
kohakoha
𝑥
≤ 25.11.00
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://g03m0n.github.io/
https://g03m0n.github.io/posts/cve-2026-26379/
https://github.com/Koha-Community/Koha
https://g03m0n.github.io/posts/cve-2026-26379/