CVE-2026-40256: Weblate

Medium severity, CVSS 5.0. EPSS: 0.4% chance of exploitation in the next 30 days.

Weblate is a web based localization tool. In versions prior to 5.17, repository-boundary validation relies on string prefix checks on resolved absolute paths. In multiple code paths, the check uses startswith against the repository root path. This is not path-segment aware and can be bypassed when the external path shares the same string prefix as the repository path (for example, repo and repo_outside). This issue has been fixed in version 5.17.

Affected products

• Weblate Weblate: before 5.17 (fixed in 5.17)

Published 2026-04-15. Last modified 2026-06-17.