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VulnerabilityPublished

CVE-2026-42150: WeblateOrg wlc · Cross-site Scripting

Affects WeblateOrg wlcSource CVE Database V5

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Not known to be exploited · CVSS 5.1 Medium : upgrade to 2.0.0 when convenient.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
5.1Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2.0.0
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 May 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 29 Oct 2026.

What to do

Upgrade wlc and weblateorg/wlc to 2.0.0.

Affected software

ProductAffectedFixed in
WeblateOrgwlcAffected
  • <2.0.0
Fixed in
  • 2.0.0
GitHubweblateorg/wlcpkg:github/weblateorg/wlcOther threatsAffected
  • <2.0.0
Fixed in
  • 2.0.0

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

AI-suggested

Upgrade wlc to version 2.0.0 or later, where the vulnerability has been patched. Since the vendor advisory confirms the fix in version 2.0.0, applying this update fully mitigates the issue. No additional mitigations are specifically recommended beyond upgrading.

Description

CVE-2026-42150 is a cross-site scripting (XSS) vulnerability in the Weblate command-line client (wlc) prior to version 2.0.0. The vulnerability arises because the HTML output format embeds API response data into HTML without proper escaping, which can lead to XSS when the output is viewed in a browser. This issue has been addressed in version 2.0.0 of wlc. The vulnerability has a medium severity with a CVSS score of 5.1.

References

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