CVE-2026-85391

CRITICAL 9.8

Peppermint through 0.5.5 Use of Hard-coded JWT Signing Secret in docker-compose.yml

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-798
Vendor	peppermint-lab
Product	peppermint
Published	Sep 3, 2026
Last Updated	Sep 3, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Peppermint-Lab / peppermint

0 ≤ 0.5.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

George Chen