CVE-2026-40256
Medium
Description
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.
SeverityMedium
CVSS5.0
Exploit probability—
Product
Weblate
PublishedApr 15, 2026
First seenApr 15, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- weblate weblate5.17 or later
- weblate5.17 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| weblate weblate | v < 5.17 | 5.17 |
| weblatePyPI | v < 5.17 | 5.17 |
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