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Description

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

PUBLISHED Reserved 2026-03-27 | Published 2026-04-14 | Updated 2026-04-15 | Assigner GitHub_M




LOW: 3.5CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Problem types

CWE-613: Insufficient Session Expiration

CWE-384: Session Fixation

Product status

>= 7.11.0, < 7.15.2
affected

References

github.com/...-proxy/security/advisories/GHSA-f24x-5g9q-753f

github.com/oauth2-proxy/oauth2-proxy/releases/tag/v7.15.2

cve.org (CVE-2026-34454)

nvd.nist.gov (CVE-2026-34454)

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