CVE-2026-62326: CWE-400: Uncontrolled Resource Consumption in WeblateOrg weblate
Description
Weblate versions prior to 2026.7 contain a vulnerability where users with the "Edit source" role can inject malicious regular expressions without timeout limits. This can cause excessive CPU consumption and lead to denial of service. The issue arises because regex checks are re-run multiple times per request without time limits, allowing catastrophic backtracking patterns to stall the system. This vulnerability is fixed in version 2026.7.
CVSS v3.1
Score 6.5medium
Affected software
WeblateOrg
weblate
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-62326 describes an uncontrolled resource consumption vulnerability (CWE-400) in Weblate, a continuous localization platform. Users with the built-in "Edit source" role can store malicious regular expressions in source string flags. These regex patterns are executed without any timeout during validation and subsequent checks, enabling catastrophic backtracking that can consume CPU indefinitely. Because Weblate re-runs these regex checks for every linked target unit when a source unit's flags change, a single malicious edit can cause sustained CPU-bound denial of service. The vulnerability is resolved in Weblate version 2026.7.
Potential Impact
The vulnerability allows a user with limited privileges (Edit source role) to cause a denial of service by stalling requests through CPU exhaustion. This impacts availability but does not affect confidentiality or integrity. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade Weblate to version 2026.7 or later, where this issue is fixed. Until then, restrict the "Edit source" role to trusted users only to reduce risk. No other official mitigation or temporary fix is documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-13T19:27:58.315Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8f55a0acd9273b496333b1
Added to database: 08/26/2026, 21:07:44 UTC
Last enriched: 09/10/2026, 09:54:04 UTC
Last updated: 10/11/2026, 06:48:17 UTC
Views: 90
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