Weblate: Mercurial argument injection via repository filenames allows authenticated command execution (CVE-2026-86035) | HOL Guard CVE

High · CVSS 8.5CVE-2026-86035

Weblate: Mercurial argument injection via repository filenames allows authenticated command execution

Answer in brief

CVE-2026-86035 records a High severity (CVSS 8.5) vulnerability in Weblate: Mercurial argument injection via repository filenames allows authenticated command execution. The current sources do not mark it as known exploited. The current feed maps WeblateOrg/weblate (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 29, 2026Updated Sep 29, 2026Source checked Sep 29, 2026First seen by HOL Sep 29, 2026Material review Sep 29, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 8.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps WeblateOrg/weblate (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
WeblateOrg/weblategeneric	>=4.11.1 <2026.8	2026.8

Recommended response

Check inventory. Check lockfiles and deployed manifests for WeblateOrg/weblate.
Review the reported fix. Update WeblateOrg/weblate to 2026.8 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 29, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.