CVE-2026-94456 Weak cryptography in postiz-app
Attackers can predict OAuth tokens and API keys by exploiting insecure random number generation, leading to unauthorized access to user accounts and data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-94456?
CVE-2026-94456 is a critical vulnerability in GitroomHQ postiz-app, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
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.
Which versions are affected by CVE-2026-94456?
How do I fix CVE-2026-94456?
No fix has been published for CVE-2026-94456 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-94456 being exploited?
There is no known exploitation of CVE-2026-94456 in the wild and no public exploit code.