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Vulnerability record · CVE-2026-85391 · published 3 September 2026

CVE-2026-85391: Hard-coded credentials vulnerability

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.

9.3 CVSS 4.0 Critical EPSS 0.64% · top 51.3% CWE-798 · Hard-coded credentials Deferred
9.3CVSS 4.0 base score
0.64%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
9 Sep 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-85391), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.