Postiz signs its session, invitation and password reset tokens with one shared secret and without any marker of what a token is for.
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.
Assessment
- CVSS
- 9.9 (v3.1)
- Severity
- Critical
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 24 October 2026
- Last updated
- 26 October 2026
- Weakness
- CWE-290, CWE-345, CWE-915
- Assigner
- 4cdc9741-f887-419a-a2fd-acbbd2729276
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
At the source
References
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