XSS in Weblate Wlc
CVE-2026-42150
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 browse…
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.000 (11.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.1 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:L.
Affected products
- Weblate Wlc
- Weblateorg Wlc — versions < 2.0.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-42150?
- CVE-2026-42150 is a medium-severity vulnerability in Weblate Wlc, classified under Cross-site Scripting. CVSS score: 5.1/10. Published 2026-05-08.
- How severe is CVE-2026-42150?
- Medium severity. CVSS v3 base score is 5.1 out of 10.