CVE-2026-115933
Forged signed tokens let any registered user take over other users and organizations
Description
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.
INFO
Published Date :
Oct. 24, 2026, 3:17 p.m.
Last Modified :
Oct. 24, 2026, 3:17 p.m.
Remotely Exploit :
No
Source :
4cdc9741-f887-419a-a2fd-acbbd2729276
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 4cdc9741-f887-419a-a2fd-acbbd2729276 | ||||
| CVSS 3.1 | CRITICAL | MITRE-CVE |
Solution
- Use unique secrets for signing different token types.
- Include token type indicators in signed tokens.
- Validate token types carefully before processing.
- Validate all token claims rigorously.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-115933.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-115933 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-115933
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-115933 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-115933 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 4cdc9741-f887-419a-a2fd-acbbd2729276
Oct. 24, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-345 Added CWE CWE-290 Added CWE CWE-915 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/115xxx/CVE-2026-115933.json">CVE-2026-115933</a> Added Reference https://gadvisory.org/advisories/PSA-2026-YT2HMH Added Reference https://github.com/gitroomhq/postiz-app Added Reference https://github.com/gitroomhq/postiz-app/commit/a5affe62c74e39c1e7ac960d50d8418b807d532c Added Reference https://github.com/gitroomhq/postiz-app/releases/tag/v2.25.3