Cross-Site Scripting (XSS) in Koha Library Management System (CVE-2026-50766)
Summary
Cross-site scripting in Koha Library Management System (CVE-2026-50766). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
A stored cross-site scripting (XSS) vulnerability in the OPAC item detail page of Koha Library Management System through 25.11 allows an authenticated remote attacker with edit_items permission to inject arbitrary web scripts via the item public notes field (items.itemnotes).
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-50766 has been found in Koha Library Management System.
Risk of unauthorized operations or information disclosure. CVSS score: 5.4/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Koha Library Management System CVE-2026-50766" on the vendor's site.
CVE-2026-50766 (Koha Library Management System) — CWE-79 / CVSS v3 5.4
Attack vector: remote (network-reachable)
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Cross-site scripting (XSS) (CWE-79) exists in Koha Library Management System.
Check the vendor advisory for the affected versions of Koha Library Management System.
Severity: Medium (CVSS 5.4/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Koha Library Management System を使っているサービスとバージョンを洗い出す。
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2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- exploit lgnas.gitbook.io
- web nvd.nist.gov
- web cve@mitre.org
- web github.com