Weblate: JavaScript localization CDN add-on allows arbitrary local file read outside the repository

[nixpkgs-security-tracker]

• CVE-2026-33220
• Nixpkgs security tracker issue
• affected package maintainers: cc @erictapen

Description

Weblate is a web based localization tool. In versions prior to 5.17, the translation memory API exposed unintended endpoints, which in turn didn't perform proper access control. This issue has been fixed in version 5.17. If developers are unable to update immediately, they can disable this feature as the CDN add-on is not enabled by default.

References

• GHSA-mqph-7h49-hqfm (x_refsource_CONFIRM)
• feat(add-ons): validate CDN fetch locations WeblateOrg/weblate#18516 (x_refsource_MISC)

6.8 MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N

• CVSS version: 3.1
• Attack Vector (AV): Network (N)
• Attack Complexity (AC): Low (L)
• Privileges Required (PR): Low (L)
• User Interaction (UI): Required (R)
• Scope (S): Changed (C)
• Confidentiality (C): High (H)
• Integrity (I): None (N)
• Availability (A): None (N)

Affected packages

• weblate (5.15.1@nixos-25.11, 5.16.2@nixos-unstable)