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CVE-2026-94456— Unauthenticated recovery of the Math.random() state behind OAuth tokens, authorization codes, client secrets and organization API keys

Quick assessment

Affected
GitroomHQ postiz-app
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Postiz generates security-sensitive credentials using 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 depen

CVSS 9.1 · Critical

Affected Version Matrix 1

VendorProduct Version RangeStatus
GitroomHQ postiz-app < 2.4.0 affected
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I. Basic Information for CVE-2026-94456

Vulnerability Information

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Vulnerability Title
Unauthenticated recovery of the Math.random() state behind OAuth tokens, authorization codes, client secrets and organization API keys
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用具有密码学弱点缺陷的PRNG
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
GitroomHQ postiz-app 0 ~ 2.4.0 -

II. Public POCs for CVE-2026-94456

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III. Intelligence Information for CVE-2026-94456

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Patches & Fixes for CVE-2026-94456 (1)

Other References for CVE-2026-94456 (3)

IV. Related Vulnerabilities

Same product: postiz-app
Same vendor: GitroomHQ
Same weakness: CWE-338

V. Comments for CVE-2026-94456

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