CVE-2026-61500
Rejetto HFS < 3.2.1 Session Forgery via Predictable Signing Key
Vexday Risk Score
25Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 9.3EPSS —KEV nãoPoC —Nuclei —Metasploit —Patch referenciado
Lifecycle
13 Jul 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
rejetto · hfs