CVE-2026-86035 Weblate - Command Injection

Weblate 4.11.1 through 2026.7.1 contains a command injection caused by improper handling of repository filenames starting with '-' in the Mercurial backend, letting authenticated users with project-scoped component.edit permission execute arbitrary commands, exploit requires specific permissions and use of Mercurial-backed RESX component.

CVSS base score 8.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.37% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Command Injection
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Published
29 September 2026
Updated
15 October 2026
Weakness
CWE-78

Vendor fix

Update to version 2026.8 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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