CVE-2026-94456
Severity CVSS v4.0:
Pending analysis
Type:
CWE-330
Use of Insufficiently Random Value
Publication date:
22/09/2026
Last modified:
22/09/2026
Description
Postiz generates security-sensitive credentials using `Math.random()` instead of a cryptographically secure source. The same helper is used for OAuth access tokens, authorization codes, client secrets, organization API keys, and PKCE verifiers, meaning these credentials depend entirely on V8’s deterministic xorshift128+ PRNG state.<br />
<br />
An unauthenticated OAuth dynamic client registration endpoint exposes freshly generated client credentials, giving attackers enough consecutive PRNG output to reconstruct that internal state. Once recovered, they can deterministically derive past and future values produced by the same generator, potentially compromising credentials belonging to other users and organizations.
Impact
Base Score 3.x
9.10
Severity 3.x
CRITICAL