SB2026042778 - Input validation error in TerriaJS-Server
Published: April 27, 2026
Security Bulletin ID
SB2026042778
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Input validation error (CVE-ID: CVE-2026-27818)
The vulnerability allows a remote attacker to bypass proxy domain restrictions.
The vulnerability exists due to improper input validation in proxy allowlist domain validation when handling proxy requests against configured proxyable domains. A remote attacker can supply a hostname that ends with an allowed domain string to bypass proxy domain restrictions.
An attacker-controlled domain such as maliciousexample.com may be incorrectly accepted when example.com is allowlisted.
Remediation
Install update from vendor's website.