CVE-2026-61500 – Rejetto HFS < 3.2.1 Session Forgery via Predictable Signing Key

​CVE ID :CVE-2026-61500

Published : July 13, 2026, 6:16 p.m. | 38 minutes ago

Description :Rejetto HFS 3.0.0 through 3.2.0 derives its session-cookie signing key from the non-cryptographic Math.random() generator and discloses outputs of the same generator to unauthenticated clients during login. A remote attacker can collect a small number of login responses, reconstruct the generator’s state, recover the signing key, and forge a valid administrator session cookie, leading to full administrative access and remote code execution via the server_code configuration feature.

Severity: 9.8 | CRITICAL

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