Understanding CVE-2026-15143: Arbitrary XML Schema Definition (XSD) String Vulnerability in guardrails-detectors
This educational analysis covers CVE-2026-15143, a critical vulnerability in the file_type content detector of guardrails-detectors, allowing remote attackers to supply arbitrary XML Schema Definition (XSD) strings. This flaw can lead to server-side requests to arbitrary URLs or local file reads, potentially resulting in sensitive information disclosure. The vulnerability has a CVSS score of 9.3 and is classified under CWE-918.