CVE-2026-40256

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.

CVSS 3.1

5.0CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 25% of CVEs (scores of 2026-10-26)

CWE

CWE-22

Published

2026-04-15

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• weblate:weblate

Packages (OSV)

References

• https://github.com/WeblateOrg/weblate/commit/e30dbcb33ae78e754ecef192d54f996b89cb4e15
• https://github.com/WeblateOrg/weblate/security/advisories/GHSA-ffgh-3jrf-8wvh

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