WeblateOrg Weblate up to 2026.6 RegexCheck denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.92-

Summaryinfo

A vulnerability classified as problematic has been found in WeblateOrg Weblate up to 2026.6. Affected by this vulnerability is an unknown functionality of the component RegexCheck. This manipulation causes denial of service. The identification of this vulnerability is CVE-2026-62326. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in WeblateOrg Weblate up to 2026.6. It has been declared as problematic. Affected by this vulnerability is some unknown processing of the component RegexCheck. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-133. As an impact it is known to affect availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-62326 since 07/13/2026. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available.

Upgrading to version 2026.7 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-133
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Weblate 2026.7

Timelineinfo

07/13/2026 CVE reserved
08/26/2026 +44 days Advisory disclosed
08/26/2026 +0 days VulDB entry created
08/26/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-62326 (🔒)
GCVE (CVE): GCVE-0-2026-62326
GCVE (VulDB): GCVE-100-395989

Entryinfo

Created: 08/26/2026 23:15
Changes: 08/26/2026 23:15 (64)
Complete: 🔍
Cache ID: 216::103

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