CVE-2026-115933

Postiz signs its session, invitation and password reset tokens with one shared secret and without any marker of what a token is for. A route that refreshes the credentials of a browser-extension channel signed data taken from the request itself and stored the result where the requesting user can read it back. A user could therefore obtain a validly signed token containing any claims they choose, which the application accepts as a session, as an organization invitation with a chosen role, as a password reset or as an enterprise provisioning token. A second, narrower route that creates team invitations signs extra fields from the request body in the same way.

CVSS v3 9.9 CRITICAL

9.9^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://gadvisory.org/advisories/PSA-2026-YT2HMH
https://github.com/gitroomhq/postiz-app
https://github.com/gitroomhq/postiz-app/commit/a5affe62c74e39c1e7ac960d50d8418b807d532c
https://github.com/gitroomhq/postiz-app/releases/tag/v2.25.3

Configurations

No configuration.

History

24 Oct 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-24 15:17

Updated : 2026-10-26 16:54

NVD link : CVE-2026-115933

Mitre link : CVE-2026-115933

CVE.ORG link : CVE-2026-115933

JSON object : View

Products Affected

No product.

CWE

CWE-290

Authentication Bypass by Spoofing

CWE-345

Insufficient Verification of Data Authenticity

CWE-915

Improperly Controlled Modification of Dynamically-Determined Object Attributes

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