CVE-2026-22250
📋 TL;DR
CVE-2026-22250 is a vulnerability in the wlc Weblate command-line client where SSL certificate verification can be bypassed for certain crafted URLs. This allows potential man-in-the-middle attacks against API communications. Users of wlc versions before 1.17.0 are affected.
💻 Affected Systems
- wlc (Weblate command-line client)
📦 What is this software?
Wlc by Weblate
⚠️ Risk & Real-World Impact
Worst Case
Attackers could intercept and manipulate API communications between wlc and Weblate servers, potentially stealing credentials, injecting malicious data, or compromising the translation workflow.
Likely Case
Man-in-the-middle attackers on the same network could intercept API traffic, potentially gaining unauthorized access to Weblate projects or modifying translation data.
If Mitigated
With proper network segmentation and TLS inspection, the risk is limited to potential data leakage from intercepted communications.
🎯 Exploit Status
Requires network access to intercept traffic and ability to craft specific URLs that trigger the SSL bypass.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.17.0
Vendor Advisory: https://github.com/WeblateOrg/wlc/security/advisories/GHSA-2mmv-7rrp-g8xh
Restart Required: No
Instructions:
1. Update wlc to version 1.17.0 or later using pip: 'pip install --upgrade wlc>=1.17.0' 2. Verify the update with: 'wlc --version'
🔧 Temporary Workarounds
Use HTTPS with verified certificates
allEnsure all Weblate server connections use properly configured HTTPS with valid certificates
export WEBLATE_URL=https://valid-certificate-domain.com
Network segmentation
allIsolate wlc usage to trusted networks with limited attack surface
🧯 If You Can't Patch
- Restrict wlc usage to internal networks with strict access controls
- Implement network monitoring for unusual SSL/TLS handshake patterns
🔍 How to Verify
Check if Vulnerable:
Check wlc version with 'wlc --version' and verify it's below 1.17.0Check Version:
wlc --versionVerify Fix Applied:
Confirm version is 1.17.0 or higher with 'wlc --version' and test connections to verify SSL validation occurs📡 Detection & Monitoring
Log Indicators:
- Failed SSL certificate validations
- Unusual URL patterns in wlc connections
Network Indicators:
- SSL/TLS handshakes without certificate validation
- HTTP traffic to Weblate API endpoints
SIEM Query:
source="wlc" AND (event="connection_error" OR event="ssl_verification_failed")