Vulnerability · Published Oct 17, 2026 · Assigned by VulnCheck

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

Medium 4.2

In plain English

A medium-severity security flaw in coder from coder. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.2Medium

Exploit odds (30 days)0.2%top 93.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/coder/coder	no fix listed	GO-2025-3921
Go	github.com/coder/coder/v2	2.23.0	GHSA-3rw9-wmc8-8948
Go	github.com/coder/coder/v2	2.23.0	GO-2025-3921

Affected products (as reported)

Vendor	Product	Versions
coder	coder	0 – before 2.23.0

Weakness: CWE-613 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

References

GitHub Security Advisory (GHSA-3rw9-wmc8-8948) vendor-advisory
VulnCheck Advisory: Coder before 2.23.0 Session Expiration Bypass via OIDC Without Refresh Token third-party-advisory