CVE-2026-15243: Improper Validation of Certificate with Host Mismatch

Apereo CAS Client accepts any CA-trusted certificate for any hostname, provided the URL the client is calling matches the configured allowlist or regex. An attacker with a MITM position DNS poisoning, rogue Wi-Fi, malicious proxy, etc. can provide any CA-signed certificate for a hostname that...

XML External Entity (XXE)

Jasig CAS Client is vulnerable to XML External Entity XXE injection. The attacker can trigger the attack by sending malicious XML data because it does not prevent loading malicious XML data via java/org/jasig/cas/util/SamlUtils.java in Jasig CAS server when Google Accounts Integration is on...