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    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.

    Published:Jun 3, 2026
    Last Modified:Jun 4, 2026
    EPS:Jun 3, 2026
    EPSS Score:0.0005
    CVSS Score:6.5

    Affected Products

    Vendor
    Koha
    Product
    Koha
    Vendor
    Koha-community
    Product
    Koha

    Exploits

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

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-664 Server Side Request Forgery

    Related CVEs

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    CVE-2026-26378 (CVSS 5.4) — Cross Site Scripting vulnerability in Koha 25.11 and before allows a remote attacker to execute arbitrary code…
    CVE-2026-31844 (CVSS 8.7) — An authenticated SQL Injection vulnerability (CWE-89) exists in the Koha staff interface in the /cgi-bin/koha/…
    CVE-2026-26377 (CVSS 5.4) — Cross Site Scripting vulnerability in Koha 25.11 and before allows a remote attacker to execute arbitrary code…
    CVE-2025-52360 (CVSS 8.8) — A Cross-Site Scripting (XSS) vulnerability exists in the OPAC search feature of Koha Library Management System…
    CVE-2025-30076 (CVSS 7.7) — Koha before 24.11.02 allows admins to execute arbitrary commands via shell metacharacters in the tools/schedul…
    CVE-2025-22954 (CVSS 10) — GetLateOrMissingIssues in C4/Serials.pm in Koha before 24.11.02 allows SQL Injection in /serials/lateissues-ex…
    CVE-2024-28739 (CVSS 7.2) — An issue in Koha ILS 23.05 and before allows a remote attacker to execute arbitrary code via a crafted script …
    CVE-2024-28740 (CVSS 9.6) — Cross Site Scripting vulnerability in Koha ILS 23.05 and before allows a remote attacker to execute arbitrary …
    CVE-2024-24336 (CVSS 8.1) — A multiple Cross-site scripting (XSS) vulnerability in the '/members/moremember.pl', and ‘/members/members-hom…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High