CVE-2026-33435 Weblate: Remote code execution during backup restoration
Attackers can achieve remote code execution by uploading malicious Git or Mercurial configuration files during project backup restoration in Weblate.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33435?
CVE-2026-33435 is a high-severity code injection vulnerability in WeblateOrg weblate, published on 15 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-33435?
3 open source packages ship an affected version, including weblate and Weblate. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
weblate PyPI | All versions | 5.17 |
weblate PyPI | All versions | 5.17 |
Weblate PyPI | All versions | 5.17 |
Products include Weblate Weblate.
How do I fix CVE-2026-33435?
Upgrade weblate to 5.17 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-33435 being exploited?
There is no known exploitation of CVE-2026-33435 in the wild and no public exploit code.
Other vulnerabilities in WeblateOrg weblate
- CVE-2025-68398 Weblate has git config file overwrite vulnerability that leads to remote code execution
- CVE-2026-34393 Weblate: Privilege escalation in the user API endpoint
- CVE-2026-34242 Weblate: Arbitrary File Read via Symlink
- CVE-2025-68279 Weblate has an arbitrary file read via symbolic links
- CVE-2022-23915 Remote Code Execution (RCE)
Sources
Also known as GHSA-558g-h753-6m33, PYSEC-2026-154.