CVE-2026-26379

CVSS 6.5 MEDIUMEPSS 0.2%CWE-918

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.5EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

03 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected products

n/a · n/a

References

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