Vulnerability in Gitroomhq Postiz-App
CVE-2026-94456
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (44.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- 4cdc9741-f887-419a-a2fd-acbbd2729276 (product)
- 4cdc9741-f887-419a-a2fd-acbbd2729276 (release-notes)
- 4cdc9741-f887-419a-a2fd-acbbd2729276 (patch)
- 4cdc9741-f887-419a-a2fd-acbbd2729276 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-94456?
- CVE-2026-94456 is a critical-severity vulnerability in Gitroomhq Postiz-App, classified under Use of Insufficiently Random Values. CVSS score: 9.1/10. Published 2026-09-22.
- How severe is CVE-2026-94456?
- Critical severity. CVSS v3 base score is 9.1 out of 10.