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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Peppermint-Lab peppermint unaffected
Version Status Constraints
0 affected ≤ 0.5.5

No data.

No data.

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Project Subscriptions

Vendors Products
Peppermint Subscribe
Peppermint Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/Peppermint-Lab/peppermint cve-icon cve-icon
https://github.com/Peppermint-Lab/peppermint/blob/0.5.5/apps/api/src/lib/jwt.ts cve-icon cve-icon
https://github.com/Peppermint-Lab/peppermint/blob/0.5.5/docker-compose.yml cve-icon cve-icon
https://github.com/Peppermint-Lab/peppermint/issues/528 cve-icon cve-icon
https://www.vulncheck.com/advisories/peppermint-through-0.5.5-use-of-hard-coded-jwt-signing-secret-in-docker-compose-yml cve-icon cve-icon
History

Thu, 03 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Thu, 03 Sep 2026 19:00:00 +0000

Type Values Removed Values Added
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.
Title Peppermint through 0.5.5 Use of Hard-coded JWT Signing Secret in docker-compose.yml
First Time appeared Peppermint
Peppermint peppermint
Weaknesses CWE-798
CPEs cpe:2.3:a:peppermint:peppermint:*:*:*:*:*:*:*:*
Vendors & Products Peppermint
Peppermint peppermint
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-03T19:00:50.811Z

Reserved: 2026-09-03T18:10:51.946Z

Link: CVE-2026-85391

cve-icon Vulnrichment

Updated: 2026-09-03T19:00:44.932Z

cve-icon NVD

Status : Received

Published: 2026-09-03T19:17:30.830

Modified: 2026-09-03T20:17:28.467

Link: CVE-2026-85391

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses