CVE-2026-26379

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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 analyzing server response times.

6.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://g03m0n.github.io/ Third Party Advisory
https://g03m0n.github.io/posts/cve-2026-26379/ Exploit Third Party Advisory
https://github.com/Koha-Community/Koha Product
https://g03m0n.github.io/posts/cve-2026-26379/ Exploit Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:koha:koha:*:*:*:*:*:*:*:*
History

22 Jul 2026, 20:10

Type Values Removed Values Added
Summary
  • (es) Un problema en Koha v.25.11 y anteriores permite a un atacante remoto ejecutar código arbitrario a través del módulo de configuración Z39.50.

04 Jun 2026, 18:54

Type Values Removed Values Added
CPE cpe:2.3:a:koha:koha:*:*:*:*:*:*:*:*
First Time Koha
Koha koha
References () https://g03m0n.github.io/ - () https://g03m0n.github.io/ - Third Party Advisory
References () https://g03m0n.github.io/posts/cve-2026-26379/ - () https://g03m0n.github.io/posts/cve-2026-26379/ - Exploit, Third Party Advisory
References () https://github.com/Koha-Community/Koha - () https://github.com/Koha-Community/Koha - Product

04 Jun 2026, 17:16

Type Values Removed Values Added
Summary (en) An issue in Koha v.25.11 and before allows a remote attacker to execute arbitrary code via the Z39.50 configuration module (en) 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.

04 Jun 2026, 15:16

Type Values Removed Values Added
CWE CWE-94 CWE-918

04 Jun 2026, 14:16

Type Values Removed Values Added
References () https://g03m0n.github.io/posts/cve-2026-26379/ - () https://g03m0n.github.io/posts/cve-2026-26379/ -
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 6.5
CWE CWE-94

03 Jun 2026, 19:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-06-03 19:16

Updated : 2026-07-22 20:10

NVD link : CVE-2026-26379

Mitre link : CVE-2026-26379

CVE.ORG link : CVE-2026-26379

JSON object : View

Products Affected

koha

  • koha
CWE
CWE-918

Server-Side Request Forgery (SSRF)