CVE-2026-62326 Weblate Has Uncontrolled Resource Consumption via
A user with Edit source role can cause denial of service by storing malicious regular expressions that consume CPU indefinitely during validation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-62326?
CVE-2026-62326 is a medium-severity denial of service 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 continuous localization platform used to manage software translations. In versions prior to 2026.7, a user with the built-in "Edit source" role can store a malicious regular expression in a source string's flags that is executed without any timeout, allowing them to stall requests and deny service. Regular expressions supplied through the regex: quality check and regex placeholders are compiled during validation but later run against translation content in RegexCheck and PlaceholderCheck with no time limit, so a catastrophic-backtracking pattern like ^(a|aa)+$ can consume CPU indefinitely. Because Weblate re-runs these checks for every linked target unit in the same request when a source unit's flags change, a single edit can trigger sustained CPU-bound denial of service. This issue is fixed in version 2026.7.
Weakness: CWE-400
Which versions are affected by CVE-2026-62326?
How do I fix CVE-2026-62326?
No fix has been published for CVE-2026-62326 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-62326 being exploited?
There is no known exploitation of CVE-2026-62326 in the wild and no public exploit code.
Sources
Also known as GHSA-r52j-4vjp-q949.