A vulnerability in Apereo CAS has been identified that could allow an attacker to trigger an unspecified security issue. The flaw affects all versions of the CAS server older than 7.3.7.1. The vulnerability was reported in a security bulletin issued by Apereo on 27 May 2026. The bulletin, titled “oidc‑vuln”, does not specify the precise risk or the conditions under which the exploit could be used. System administrators are advised to consult the Apereo security bulletin for patch information and to apply any recommended updates. No additional mitigation guidance was provided by the issuer. The issue remains unclassified, and users of affected versions should monitor the official channels for further updates.
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