Peppermint through 0.5.5 Use of Hard-coded JWT Signing Secret in docker-compose.yml
Priority MEDIUM 49CWE-798Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-798.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00641 50th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Peppermint-Lab | peppermint | up to 0.5.5 | — | No fix listed | CNA |
- peppermint VendorPeppermint-Lab Affected up to 0.5.5 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-85391
- 2026-10-03 Alias added: GHSA-mjr9-fw4p-963x
- 2026-10-21 EPSS moved to the 50th–90th percentile
References
More Peppermint-Lab vulnerabilities
- TI-2026-75087 Missing authorization in Peppermint lets users act as other users CVSS 4.0MEDIUM 5.3
- TI-2026-50820 Peppermint Lab Peppermint - Broken Access Control CVSS 3.1HIGH 8.8
- TI-2026-50814 Peppermint Lab Peppermint - Broken Access Control CVSS 3.1HIGH 8.1
- TI-2026-58600 Peppermint through 0.5.5 Authorization Bypass on the User Logout Endpoint CVSS 4.0MEDIUM 5.3
Sources
- CVE-2026-85391 · CVE Program
- CVE-2026-85391 · NVD
- FIRST EPSS
- GHSA-mjr9-fw4p-963x · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences