CVE-2026-42150
wlc: print_html outputs API data without HTML escaping, enabling stored XSS
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.
INFO
Published Date :
May 8, 2026, 4:16 a.m.
Last Modified :
May 12, 2026, 2 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update wlc to version 2.0.0 or later.
- Avoid using HTML output in vulnerable versions.
Public PoC/Exploit Available at Github
CVE-2026-42150 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-42150.
| URL | Resource |
|---|---|
| https://github.com/WeblateOrg/wlc/commit/0f3e58f6d7457b05d48ef40f579a172c4c8b8469 | Patch |
| https://github.com/WeblateOrg/wlc/pull/1327 | Issue Tracking Patch |
| https://github.com/WeblateOrg/wlc/releases/tag/2.0.0 | Release Notes |
| https://github.com/WeblateOrg/wlc/security/advisories/GHSA-gx2m-mcc2-r4p3 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-42150 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-42150
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-42150 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-42150 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 12, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:weblate:wlc:*:*:*:*:*:*:*:* versions up to (excluding) 2.0.0 Added Reference Type GitHub, Inc.: https://github.com/WeblateOrg/wlc/commit/0f3e58f6d7457b05d48ef40f579a172c4c8b8469 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/WeblateOrg/wlc/pull/1327 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/WeblateOrg/wlc/releases/tag/2.0.0 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/WeblateOrg/wlc/security/advisories/GHSA-gx2m-mcc2-r4p3 Types: Vendor Advisory -
New CVE Received by [email protected]
May. 08, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:L Added CWE CWE-79 Added Reference https://github.com/WeblateOrg/wlc/commit/0f3e58f6d7457b05d48ef40f579a172c4c8b8469 Added Reference https://github.com/WeblateOrg/wlc/pull/1327 Added Reference https://github.com/WeblateOrg/wlc/releases/tag/2.0.0 Added Reference https://github.com/WeblateOrg/wlc/security/advisories/GHSA-gx2m-mcc2-r4p3