8

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2026-23535

CVE-2026-23535: wlc Path traversal: Unsanitized API slugs in download command

wlc is a Weblate command-line client using Weblate's REST API. Prior to 1.17.2, the multi-translation download could write to an arbitrary location when instructed by a crafted server. This vulnerability is fixed in 1.17.2.

(GitHub Advisory)

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CVE-2026-23535

CVE-2026-23535:

8

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
wlc	pip	< 1.17.2	1.17.2

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability exists in the download_component method of the Download class in wlc/main.py. The patch for the vulnerability, found in commit 216e691c6e50abae97fe2e4e4f21501bf49a585f, shows that the component.project.slug and component.slug values were previously used directly to construct a file path. A malicious server could provide specially crafted slugs containing path traversal characters (e.g., ../), which would cause the wlc client to write a downloaded file to an unintended directory on the user's machine. The fix involves sanitizing these slugs using a new sanitize_slug function, which replaces potentially dangerous characters with a hyphen. Therefore, the Download.download_component function is the vulnerable function as it processes the malicious input and performs the unsafe file write operation.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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