CVE-2026-42150 json
wlc: print_html outputs API data without HTML escaping, enabling stored XSS
published 6mo ago modified 14d ago also EUVD-2026-28501 , GHSA-gx2m-mcc2-r4p3 , PYSEC-2026-2321
- cvss
- 5.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 6%
- public exploits
- 0
- none known
Summary
wlc is a Weblate command-line client using Weblate's REST API. Prior to version 2.0.0, the HTML output format in wlc embeds API response data into HTML without escaping, allowing cross-site scripting when the output is rendered in a browser. This issue has been patched in version 2.0.0.
Patch / fix
- pypi wlc 2.0.0
- weblate wlc 2.0.0
- wlc Debian 14 2.0.0-1
debian advisories DEBIAN-CVE-2026-42150
- github.com/WeblateOrg/wlc@0f3e58f commit
- github.com/WeblateOrg/wlc#1327 pull request
- github.com/WeblateOrg/wlc/releases/tag/2.0.0 release
Is CVE-2026-42150 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6mo ago
Exploit prediction
0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.1 | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:L |
| GitHub | 3.1 | 5.1 | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:L |
| NVD | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
| OSV | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | wlc | <2.0.0 |
2.0.0 |
Affected products
- WeblateOrg wlc
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/WeblateOrg/wlc/pull/1327
web, issue-tracking, patch
-
github.com
/WeblateOrg/wlc/commit/0f3e58f6d7457b05d48ef40f579a172c4c8b8469
web, patch
-
github.com
/WeblateOrg/wlc/security/advisories/GHSA-gx2m-mcc2-r4p3
web, vendor-advisory, advisory
-
github.com
/WeblateOrg/wlc/releases/tag/2.0.0
web, release-notes, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-42150
advisory
-
github.com
/WeblateOrg/wlc
package
Sources
- CVE List CVE-2026-42150
- GitHub Advisory GHSA-gx2m-mcc2-r4p3
- NVD CVE-2026-42150
- OSV PYSEC-2026-2321
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.