CVE-2026-26379

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-06-03 · updated 2026-07-22
Weakness: CWE-918

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.

Affected products

Koha Community Koha: through 25.11.00

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/

Get alerted when CVE-2026-26379 or the next vulnerability affects your stack