Vulnerability in Apereo Cas
CVE-2026-59099
Apereo CAS 7.3.0 before 8.0.0-RC6 contains a cryptographic vulnerability that allows remote unauthenticated attackers to recover plaintext conversation state by exploiting AES-GCM initialization vector reuse across the server lifetime. Att…
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Apereo Cas — versions 7.3.0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (release-notes)
- disclosure@vulncheck.com (technical-description, exploit)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-59099?
- CVE-2026-59099 is a critical-severity vulnerability in Apereo Cas, classified under Reusing a Nonce, Key Pair in Encryption. CVSS score: 9.1/10. Published 2026-07-02.
- How severe is CVE-2026-59099?
- Critical severity. CVSS v3 base score is 9.1 out of 10.