CVE-2026-61500

CriticalCVSS 9.8/10Last modified Oct 24, 2026

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-338

Affected software

No affected versions have been published.

Timeline

Published: Jul 13, 2026
Last modified: Oct 24, 2026
NVD status: Deferred

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