CVE-2026-85391: Use of Hard-coded Credentials in Peppermint-Lab peppermint
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.
CVSS v4.0
Score 9.3critical
Affected software
Peppermint-Lab
peppermint
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-85391 identifies a critical vulnerability in Peppermint (up to version 0.5.5) where a hardcoded JWT signing secret is present in the docker-compose.yml configuration file. Attackers who obtain this secret can create valid JSON Web Tokens for arbitrary user IDs, bypassing authentication controls and accessing protected resources without legitimate credentials.
Potential Impact
Exploitation of this vulnerability enables unauthenticated attackers to impersonate any user by forging session tokens, leading to unauthorized access to sensitive endpoints and potentially compromising the confidentiality and integrity of user data and application functionality.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should avoid deploying affected versions or remove the hardcoded secret and replace it with a securely managed secret. Monitor vendor communications for updates on patches or official mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-03T18:10:51.946Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a99c5a7acd9273b4957e1e7
Added to database: 09/03/2026, 19:08:23 UTC
Last enriched: 09/07/2026, 12:53:33 UTC
Last updated: 10/18/2026, 18:48:24 UTC
Views: 85
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