Weblate: Remote code execution during backup restoration

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Summary

CVECVE-2026-33435
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-15 19:16:35 UTC
Updated2026-04-15 19:16:35 UTC
DescriptionWeblate is a web based localization tool. In versions prior to 5.17, the project backup didn't filter Git and Mercurial configuration files which could lead to remote code execution under certain circumstances. This issue has been fixed in version 5.17. If developers are unable to update immediately, they can limit the scope of the vulnerability by restricting access to the project backup, as it is only accessible to users who can create projects.

Risk And Classification

Primary CVSS: v3.1 8 HIGH from [email protected]

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

Problem Types: CWE-23 | CWE-94 | CWE-434 | CWE-23 CWE-23: Relative Path Traversal | CWE-94 CWE-94: Improper Control of Generation of Code ('Code Injection') | CWE-434 CWE-434: Unrestricted Upload of File with Dangerous Type

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8HIGHCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED8.1HIGHCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA WeblateOrg Weblate affected < 5.17 Not specified

References

ReferenceSourceLinkTags
github.com/WeblateOrg/weblate/pull/18549 [email protected] github.com
github.com/WeblateOrg/weblate/security/advisories/GHSA-558g-h753-6m33 [email protected] github.com
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