PT-2026-32954 · Unknown · Oauth2 Proxy

Fnoehwm + 1 · Published 2026-04-14 · Updated 2026-04-15 · CVE-2026-34454

Positive Technologies (AI Summary)

CVSS v3.1

3.5

Low

AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions OAuth2 Proxy versions 7.11.0 through 7.15.1

Description A regression prevents the reverse proxy from clearing the session cookie when rendering the sign-in page. In deployments relying on the sign-in page for the logout flow, the browser session remains valid even when the sign-in page is displayed. This could allow a subsequent user on a shared workstation or device to access the previous user's authenticated session. Deployments using a dedicated logout/sign-out endpoint to terminate sessions are not affected.

Recommendations Update to version 7.15.2. Use the dedicated logout/sign-out endpoint of OAuth2 Proxy instead of relying on the sign-in page to clear sessions. Ensure the application logout flow explicitly clears the OAuth2 Proxy session cookie before redirecting users to the sign-in page. Clear the session cookie at the reverse proxy or application layer as a temporary mitigation.

Fix

Insufficient Session Expiration

Session Fixation

Weakness Enumeration

CWE-613

CWE-384

Related Identifiers

CVE-2026-34454

GHSA-F24X-5G9Q-753F

Affected Products

Oauth2 Proxy

References · 7

• https://osv.dev/vulnerability/GHSA-f24x-5g9q-753f · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34454 · Security Note
• https://github.com/oauth2-proxy/oauth2-proxy · Note
• https://github.com/oauth2-proxy/oauth2-proxy/pull/2605 · Note
• https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-f24x-5g9q-753f · Note
• https://github.com/oauth2-proxy/oauth2-proxy/releases/tag/v7.15.2 · Note
• https://twitter.com/CVEnew/status/2044338898097365336 · Twitter Post