Vulnerability Description
Weblate is a web-based continuous localization platform used to manage software translations. In versions prior to 2026.8, a user permitted to manage component repository URLs can perform server-side request forgery against internal services through DNS rebinding during VCS operations. Weblate validates the hostname's first DNS resolution, but the external VCS clients that later connect perform a separate DNS lookup, so an attacker-controlled hostname that initially resolves to a public address can be re-pointed to an internal or private address before the connection is made. By triggering a clone, fetch, push, or similar remote operation, the attacker can cause Weblate to reach internal VCS-compatible services and potentially expose private repository contents. Installations that permit untrusted repository hostnames while using VCS_RESTRICT_PRIVATE=True are affected. This issue is fixed in version 2026.8.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://github.com/WeblateOrg/weblate/commit/3f31f094eb4f99587607af0085d4fb35461
- https://github.com/WeblateOrg/weblate/security/advisories/GHSA-45m9-pf98-8jmq
FAQ
What is CVE-2026-77573?
CVE-2026-77573 is a vulnerability with a CVSS score of 3.5 (LOW). Weblate is a web-based continuous localization platform used to manage software translations. In versions prior to 2026.8, a user permitted to manage component repository URLs can perform server-side ...
How severe is CVE-2026-77573?
CVE-2026-77573 has been rated LOW with a CVSS base score of 3.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-77573?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.