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VulnerabilityPublished Updated

CVE-2026-86035: WeblateOrg weblate · OS Command Injection

Affects WeblateOrg weblateSource CVE Database V5

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Mentioned vulnerabilities

Not known to be exploited · CVSS 8.5 High : upgrade to 2026.8 soon.

Data as of 12 Nov 2026, 23:24 UTC

CVSS 3.1 base score
8.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 40% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2026.8
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

What to do

Upgrade WeblateOrg weblate to 2026.8.

Affected software

ProductAffectedFixed in
WeblateOrgweblateAffected
  • >=4.11.1 <2026.8
Fixed in
  • 2026.8
PyPIweblatepkg:pypi/weblateOther threatsAffected
  • >=4.11.1 <2026.8
Fixed in
  • 2026.8

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Weblate to version 2026.8 or later, where this vulnerability has been patched. No other mitigations are indicated or recommended by the vendor advisory. Until patched, restrict project-scoped component.edit permissions to trusted users only.

Description

Weblate versions from 4.11.1 up to but not including 2026.8 contain an OS command injection vulnerability in the Mercurial backend. This flaw allows an authenticated user with project-scoped component.edit permission to exploit repository filenames starting with a dash (-) as Mercurial options, potentially leading to arbitrary command execution with the Weblate service account privileges. This vulnerability is a residual issue from an incomplete fix for CVE-2022-23915 and has been addressed in version 2026.8.

References

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