Vulnerability in Coder
CVE-2025-71435
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.
Published .
CVSS v3 metric
CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/coder/coder/security/advisories/GHSA-3rw9-wmc8-8948 (vendor-advisory)
- www.vulncheck.com/advisories/coder-before-2.23.0-session-expiration-bypass-via-… (third-party-advisory)
Frequently asked questions
- What is CVE-2025-71435?
- CVE-2025-71435 is a medium-severity vulnerability in Coder, classified under Insufficient Session Expiration. CVSS score: 4.2/10. Published 2026-10-17.
- How severe is CVE-2025-71435?
- Medium severity. CVSS v3 base score is 4.2 out of 10.