Server-side Request Forgery (SSRF) Affecting weblate package, versions [,5.15)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-WEBLATE-17675161
- published29 Jun 2026
- disclosed26 May 2026
- creditUnknown
Introduced: 26 May 2026
CVE-2025-66407 (opens in a new tab)How to fix?
Upgrade weblate to version 5.15 or higher.
Overview
weblate is an A web-based continuous localization system with tight version control integration
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) via the Create Component process. An attacker can access internal network resources and enumerate local files by supplying arbitrary protocols and addresses in the repository URL field when the Mercurial backend is enabled. This can lead to exposure of sensitive information, including potential access to cloud metadata services and internal endpoints. This is only exploitable if the Mercurial backend is enabled in the configuration.
Workaround
This vulnerability can be mitigated by removing Mercurial from the VCS_BACKENDS configuration.