CVE-2026-85391 Peppermint through 0.5.5 Use of Hard-coded JWT Signing Secret in docker-compose.yml
Hardcoded JWT secret allows attackers to forge tokens and access any user account without credentials.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85391?
CVE-2026-85391 is a critical vulnerability in Peppermint-Lab peppermint, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Peppermint through 0.5.5 contains a hardcoded JWT signing secret in docker-compose.yml that allows unauthenticated attackers to forge session tokens for any account. Attackers can use the published secret to mint valid tokens for arbitrary user IDs and access protected endpoints without credentials.
Weakness: CWE-798
Which versions are affected by CVE-2026-85391?
How do I fix CVE-2026-85391?
No fix has been published for CVE-2026-85391 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-85391 being exploited?
There is no known exploitation of CVE-2026-85391 in the wild and no public exploit code.
Sources
Also known as GHSA-mjr9-fw4p-963x.