CVE-2026-72610: Koha Community Koha - Stored SQL Injection via Patron lang Field in Issue Slip Generation

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-11 · updated 2026-10-24
Weakness: CWE-89

Description

A stored SQL injection vulnerability in Koha through 24.11.17, 25.05.12, 25.11.06, and 26.05.01 allows authenticated staff with the borrowers => edit_borrowers permission to cause a time-based denial of service by storing a SQL payload in a patron lang field. The value is concatenated raw into a subquery in Koha::AdditionalContents->search_for_display when an issue slip is printed for the affected patron. The 25-character column length limits exploitation to timing attacks; data extraction is not practical. The stored payload executes on each subsequent issue-slip print, scaling linearly with the SLEEP value and the number of slip-news rows.

Affected products

Koha Community Koha: before 24.11.18; from 25.05.0 before 25.05.13; from 25.11.0 before 25.11.07; from 26.05.0 before 26.05.02 — fixed in 24.11.18, 25.05.13, 25.11.07, 26.05.02

How to fix

Upgrade to a fixed version: Koha Community Koha 24.11.18, 25.05.13, 25.11.07, 26.05.02. Check the vendor advisory for mitigations.

References

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