GitroomHQ postiz-app up to 2.3.x Authentication Middleware improper authentication

Summaryinfo

A vulnerability described as critical has been identified in GitroomHQ postiz-app up to 2.3.x. This vulnerability affects unknown code of the component Authentication Middleware. Executing a manipulation can lead to improper authentication. This vulnerability is tracked as CVE-2026-94455. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in GitroomHQ postiz-app up to 2.3.x and classified as critical. This vulnerability affects an unknown code block of the component Authentication Middleware. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

An HTTP endpoint intended for provisioning enterprise and reseller organisations is reachable without any session. The authentication middleware is bound only to an explicit list of controllers, and the enterprise controller is not on that list, so no authentication runs for these routes. The endpoint's only check is that the request body carries a token bearing a valid signature from the instance secret. It does not check what that token was issued for. Login tokens are signed with the same secret and carry no purpose, audience or expiry claim, so an ordinary user's own session token satisfies the check. Presented with such a token, the endpoint creates a new organisation holding the highest subscription tier, flagged as lifetime and with a channel allowance far above any sold plan, creates an organisation-owner account alongside it, and returns the new organisation's API key in the response body. That key is immediately valid against the public API.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-94455 since 09/21/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

Upgrading to version 2.4.0 eliminates this vulnerability.

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Productinfo

Vendor

• GitroomHQ

Name

• postiz-app

Version

• 2.0
• 2.1
• 2.2
• 2.3

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CPE 2.2info

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