What is CVE-2026-26379?

CVE-2026-26379 is a medium-severity vulnerability in Koha, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2026-06-03.

How severe is CVE-2026-26379?

Medium severity. CVSS v3 base score is 6.5 out of 10.

SSRF in Koha

CVE-2026-26379

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 analyzi…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.001 (16.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Koha
N/a — versions n/a

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

cve@mitre.org (Product)
cve@mitre.org (Third Party Advisory)
cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2026-26379?: CVE-2026-26379 is a medium-severity vulnerability in Koha, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2026-06-03.
How severe is CVE-2026-26379?: Medium severity. CVSS v3 base score is 6.5 out of 10.