What’s Vulnerable › Vulnerabilities

CVE-2026-85392: Peppermint through 0.5.5 Authorization Bypass on the User Logout Endpoint

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-03 · updated 2026-09-09
• Weakness: CWE-639

Description

Peppermint through 0.5.5 contains an authorization bypass vulnerability in the GET /api/v1/auth/user/:id/logout endpoint that allows authenticated attackers to delete sessions for any user by supplying arbitrary user IDs. Attackers can forcibly log out any user including administrators by calling the logout handler with another user's ID, since the endpoint performs no authorization checks to verify the caller owns the target account.

Affected products

• Peppermint-Lab peppermint: through 0.5.5

References

• https://github.com/Peppermint-Lab/peppermint
• https://github.com/Peppermint-Lab/peppermint/blob/0.5.5/apps/api/src/controllers/auth.ts
• https://github.com/Peppermint-Lab/peppermint/issues/529
• https://www.vulncheck.com/advisories/peppermint-through-0.5.5-authorization-bypass-on-the-user-logout-endpoint

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