CVE-2025-71435: Coder before 2.23.0 Session Expiration Bypass via OIDC Without Refresh Token

Severity: medium (CVSS 4.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-17 · updated 2026-10-24
Weakness: CWE-613

Description

Coder before 2.23.0 contains a session expiration bypass vulnerability that allows authenticated users to retain access after OIDC token expiry when no refresh token is issued. Users can keep their APIKey cookie active through regular use, extending it every 24 hours to access Coder indefinitely after losing OIDC authorization.

Affected products

coder: before 2.23.0 — fixed in 2.23.0

How to fix

Upgrade to a fixed version: coder 2.23.0. Check the vendor advisory for mitigations.

References

https://github.com/coder/coder/security/advisories/GHSA-3rw9-wmc8-8948
https://www.vulncheck.com/advisories/coder-before-2.23.0-session-expiration-bypass-via-oidc-without-refresh-token

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