CVE-2026-55227 Observable object existence disclosure in private Weblate projects via globally scoped object lookups
Attackers can infer the existence of objects in private Weblate projects by observing HTTP status code differences, leaking metadata about restricted content.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-55227?
CVE-2026-55227 is a medium-severity vulnerability in WeblateOrg weblate, published on 26 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Weblate is a web-based localization tool. In versions prior to 2026.7, several endpoints look up objects in a globally scoped manner rather than restricting the lookup to projects the user can access, so they return HTTP 403 (Forbidden) instead of 404 (Not Found) when a user requests an object they are not authorized to see. This difference lets unauthorized users infer whether a given object exists in a private Weblate project. The issue has been fixed in version 2026.7.
Weakness: CWE-203
Which versions are affected by CVE-2026-55227?
3 open source packages ship an affected version, including weblate.
| Package | Affected | Fixed in |
|---|---|---|
weblate PyPI | All versions | 2026.7 |
weblate PyPI | All versions | 2026.7 |
weblate PyPI | All versions | 2026.7 |
How do I fix CVE-2026-55227?
Upgrade weblate to 2026.7 or later.
Is CVE-2026-55227 being exploited?
There is no known exploitation of CVE-2026-55227 in the wild and no public exploit code.
Sources
Also known as GHSA-2p9g-x3cv-5hh4, PYSEC-2026-3941.