CVE-2026-33435: Weblate: Remote code execution during backup restoration
Impact The project backup didn't filter Git and Mercurial configuration files and this could lead to remote code execution under certain circumstances.
Patches https://github.com/WeblateOrg/weblate/pull/18549
Workarounds The project backup is only accessible to users who can create projects. Restricting access to this limits scope of the vulnerability.
References This issue was reported by ggamno via HackerOne.
Other sources
Weblate 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.
— NVD
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2026-33435?
CVE-2026-33435 has a high severity due to the remote code execution risk associated with improper handling of backup restoration.
How do I fix CVE-2026-33435?
To mitigate CVE-2026-33435, upgrade Weblate to version 5.17 or later to ensure the vulnerability is patched.
What versions of Weblate are affected by CVE-2026-33435?
CVE-2026-33435 affects all versions of Weblate prior to 5.17.
What is the impact of CVE-2026-33435?
The impact of CVE-2026-33435 is that an attacker may execute arbitrary code on the server by exploiting unfiltered Git and Mercurial configuration files during backup restoration.
Is there a workaround for CVE-2026-33435?
Currently, the recommended solution for CVE-2026-33435 is to upgrade to the latest version, as there are no effective workarounds available.