CVE-2026-34454
OAuth2 Proxy: Session cookie not cleared when rendering sign-in page
OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. A regression introduced in 7.11.0 prevents OAuth2 Proxy from clearing the session cookie when rendering the sign-in page. In deployments that rely on the sign-in page as part of their logout flow, a user may be shown the sign-in page while the existing session cookie remains valid, meaning the browser session is not actually logged out. On shared workstations or devices, a subsequent user could continue to use the previous user's authenticated session. Deployments that use a dedicated logout/sign-out endpoint to terminate sessions are not affected. This issue is fixed in 7.15.2
| CWE | CWE-613 CWE-384 |
| Vendor | oauth2-proxy |
| Product | oauth2-proxy |
| Published | Apr 14, 2026 |
| Last Updated | Apr 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N