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    CVE-2026-83589

    A flaw was found in oauth-proxy. The application fails to properly validate the destination redirect parameter (`rd`) during post-login redirection. A remote attacker can exploit this vulnerability by enticing a user to follow a specially crafted link, resulting in the user being redirected to an arbitrary external website after authenticating. This open redirect can be leveraged to conduct phishing attacks or credential theft.

    Published:Aug 31, 2026
    Last Modified:Oct 30, 2026
    EPS:Oct 1, 2026
    EPSS Score:0.00282
    CVSS Score:6.1

    Affected Products

    Vendor
    Oauth2 Proxy Project
    Product
    Oauth2 Proxy
    Vendor
    Redhat
    Product
    Openshift

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-178 Cross-Site Flashing

    Related CVEs

    CVE-2026-76835 (CVSS 9.3) — OAuth2 Proxy honours a client-supplied X-Forwarded-Uri header when deciding whether a request may skip authent…
    CVE-2026-40575 (CVSS 9.1) — OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. Versions 7.5.0 through 7.…
    CVE-2026-41059 (CVSS 8.2) — OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. Versions 7.5.0 through 7.…
    CVE-2026-40574 (CVSS 6.8) — OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. Prior to 7.15.2, an autho…
    CVE-2026-34457 (CVSS 9.1) — OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. Versions prior to 7.15.2 …
    CVE-2026-34454 (CVSS 3.5) — OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. A regression introduced i…
    CVE-2025-64484 (CVSS 8.5) — OAuth2-Proxy is an open-source tool that can act as either a standalone reverse proxy or a middleware componen…
    CVE-2025-54576 (CVSS 9.1) — OAuth2-Proxy is an open-source tool that can act as either a standalone reverse proxy or a middleware componen…
    CVE-2021-21411 (CVSS 5.5) — OAuth2-Proxy is an open source reverse proxy that provides authentication with Google, Github or other provide…
    CVE-2021-21291 (CVSS 4.7) — OAuth2 Proxy is an open-source reverse proxy and static file server that provides authentication using Provide…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High