CVE-2026-92749 in SafeLine
Summary
by MITRE • 09/16/2026
SafeLine through 9.4.1 derives the management console session-signing secret from a time-seeded math/rand generator, allowing attackers to reconstruct the key offline. Unauthenticated remote attackers who can bound the install timestamp can regenerate the secret and forge valid administrator session cookies to gain control of protected sites.
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Analysis
by VulDB Data Team • 09/16/2026
The vulnerability identified in SafeLine versions up to 9.4.1 represents a critical failure in cryptographic key management, specifically involving the generation of secrets for signing management console sessions. The core technical flaw lies in the use of Go's standard math/rand package seeded with time-based entropy to derive the session-signing secret. In modern cybersecurity practices, pseudo-random number generators like math/rand are deterministic and predictable if their seed is known or can be reasonably estimated. By relying on a timestamp for seeding, the system fails to utilize a cryptographically secure random number generator such as crypto/rand, which draws from operating-system-level entropy sources that are significantly more robust against prediction attacks. This design choice introduces a fundamental weakness in the integrity and authenticity mechanisms of the application's authentication layer.
The operational impact of this flaw is severe because it allows unauthenticated remote attackers to bypass access controls entirely. An attacker who can estimate or bound the installation timestamp of the SafeLine instance possesses sufficient information to reconstruct the mathematical sequence used by the math/rand generator. By reproducing the same seed, the attacker can generate the exact session-signing secret that the server uses. With this reconstructed key, the attacker is able to forge valid administrator session cookies without any prior authentication credentials. This capability effectively grants full control over the protected sites managed through the SafeLine console, enabling malicious actors to modify configurations, exfiltrate sensitive data, or deploy further attacks against downstream systems under the guise of an authorized administrator.
This vulnerability aligns with CWE-330: Use of Insufficiently Random Values and CWE-613: Insufficient Session Expiration, as it involves both poor randomness generation and the resulting compromise of session integrity. From a threat modeling perspective using the MITRE ATT&CK framework, this exploit maps to T1528: Steal Application Access Token, where adversaries obtain legitimate credentials or tokens to impersonate users. It also relates to T1078: Valid Accounts, as the attacker creates valid administrative sessions without possessing actual user accounts. The ability to forge session cookies undermines the trust model of the web application, allowing for privilege escalation and unauthorized access that persists until the secret is rotated or the vulnerability is patched.
Mitigation strategies must prioritize immediate remediation through software updates to versions where this flaw has been addressed by implementing cryptographically secure random number generation for all secrets. In environments where patching is not immediately feasible, administrators should manually rotate session signing keys and ensure that server clocks are synchronized accurately to reduce the window of predictability, although this is a weak defense compared to fixing the underlying code. Furthermore, organizations should implement strict access controls on management interfaces, such as IP whitelisting or multi-factor authentication, to add layers of defense-in-depth. Regular security audits focusing on cryptographic implementations and adherence to standards like OWASP Top 10 are essential to prevent similar vulnerabilities in future deployments.