Vulnerability · Published May 8, 2026 · Assigned by GitHub_M
CVE-2026-42150wlc: print_html outputs API data without HTML escaping, enabling stored XSS
Medium 5.1
In plain English
A medium-severity cross-site scripting in wlc from WeblateOrg. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.1Medium
Exploit odds (30 days)0.2%top 93.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | wlc | no fix listed | DEBIAN-CVE-2026-42150 |
| Debian:13 | wlc | no fix listed | DEBIAN-CVE-2026-42150 |
| Debian:14 | wlc | 2.0.0-1 | DEBIAN-CVE-2026-42150 |
| PyPI | wlc | 2.0.0 | GHSA-gx2m-mcc2-r4p3 |
| PyPI | wlc | 2.0.0 | PYSEC-2026-2321 |
| Ubuntu:25.10 | wlc | no fix listed | UBUNTU-CVE-2026-42150 |
| Ubuntu:26.04:LTS | wlc | no fix listed | UBUNTU-CVE-2026-42150 |
| Ubuntu:26.10 | wlc | no fix listed | UBUNTU-CVE-2026-42150 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| WeblateOrg | wlc | < 2.0.0 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:L
References
- https://github.com/WeblateOrg/wlc/security/advisories/GHSA-gx2m-mcc2-r4p3 x_refsource_CONFIRM
- https://github.com/WeblateOrg/wlc/pull/1327 x_refsource_MISC
- https://github.com/WeblateOrg/wlc/commit/0f3e58f6d7457b05d48ef40f579a172c4c8b8469 x_refsource_MISC
- https://github.com/WeblateOrg/wlc/releases/tag/2.0.0 x_refsource_MISC