High 8.5Published Sep 29, 2026

CVE-2026-86035Weblate: Mercurial argument injection via repository filenames allows authenticated command execution

Updated under an hour ago (2026-10-19 09:10 UTC)

Does this affect you?

It affects WeblateOrg weblate. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.37%, higher than 29% of scored CVEs.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for WeblateOrg weblate

Exploited in the last 30 days

Weblate is a web-based continuous localization platform used to manage software translations. Weblate 4.11.1 through 2026.7.1 contains an argument-injection vulnerability in its Mercurial backend. Repository filenames beginning with - could be interpreted as Mercurial options instead of literal paths. An authenticated user with project-scoped component.edit permission could exploit this through a Mercurial-backed RESX component using the Update RESX files add-on. A later repository update could execute arbitrary commands with the privileges of the Weblate service account. This is a residual incomplete fix for CVE-2022-23915. This issue has been patched in version 2026.8.

CVSS: 8.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-78, CWE-88
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.37% (percentile 29)
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 2, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

WeblateOrg weblate weblateorg:weblate (from the name)	from 4.11.1, < 2026.8	CNA record

References

https://github.com/WeblateOrg/weblate/security/advisories/GHSA-327h-qqgm-qv55x-refsource-confirm
https://github.com/WeblateOrg/weblate/pull/20768x-refsource-misc
https://github.com/WeblateOrg/weblate/commit/f60a9759a6d851bd10ccdefe9b1b7f0cdb9e9bbdx-refsource-misc
https://github.com/WeblateOrg/weblate/releases/tag/weblate-2026.8x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.