{"@context":"https://openvex.dev/ns/v0.2.0","@id":"https://database.harborguard.co/cve/CVE-2026-59099/vex.json","author":"HarborGuard Database","role":"Document Creator","timestamp":"2026-07-02T19:42:51.897Z","version":1,"tooling":"HarborGuard Database (https://database.harborguard.co)","statements":[{"vulnerability":{"name":"CVE-2026-59099","@id":"https://www.cve.org/CVERecord?id=CVE-2026-59099","description":"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. Attackers can collect multiple client-side webflow execution tokens from the unauthenticated login page and perform known-plaintext analysis to decrypt the webflow conversation state due to keystream reuse caused by a fixed all-zero IV paired with the same encrypt"},"products":[{"@id":"cpe:2.3:a:apereo:cas:*:*:*:*:*:*:*:*","identifiers":{"cpe23":"cpe:2.3:a:apereo:cas:*:*:*:*:*:*:*:*"}}],"status":"affected","action_statement":"Update to a fixed version: 8.0.0-RC6.","timestamp":"2026-07-02T19:42:51.897Z"}]}