{"id":"CVE-2026-49332","title":"A flaw was found in openshift/oauth-proxy","summary":"A flaw was found in openshift/oauth-proxy. The proxy sets authenticated identity headers using only dash-variant keys (X-Forwarded-User) but does not strip underscore-variant keys (X_Forwarded_User) from incoming requests. WSGI and PHP f…","severity":"high","cvss":8.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N","cwe":["CWE-436"],"vendor":"Red Hat","product":"openshift4/ose-oauth-proxy","affected":["openshift4/ose-oauth-proxy (all versions)","openshift4/ose-oauth-proxy (all versions)","openshift4/ose-oauth-proxy (all versions)","openshift4/ose-oauth-proxy-rhel9 (all versions)","openshift4/ose-oauth-proxy-rhel9 (all versions)","openshift4/ose-oauth-proxy-rhel9 (all versions)","openshift4/ose-oauth-proxy-rhel9 (all versions)","openshift4/ose-oauth-proxy-rhel9 (all versions)","openshift4/ose-oauth-proxy-rhel9 (all versions)","openshift4/ose-oauth-proxy-rhel9 (all versions)","openshift4/ose-oauth-proxy-rhel9 (all versions)"],"published":"2026-07-28","updated":"2026-09-21","sourceUpdated":"2026-09-21T17:17:35.260","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-49332","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:50681","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:50758","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:51007","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:51013","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:51022","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:51025","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:51038","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:54188","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:54206","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:56912","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:60023","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-49332","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2483253","label":"secalert@redhat.com"}],"tags":["nvd","cve.org"],"epss":0.00301,"epssPercentile":0.23046,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-07-28T13:02:35.727357Z"},"ingestedAt":"2026-08-16T10:37:48.125Z","slug":"CVE-2026-49332","body":"## Overview\n\nA flaw was found in openshift/oauth-proxy. The proxy sets authenticated identity headers using only dash-variant keys (X-Forwarded-User) but does not strip underscore-variant keys (X_Forwarded_User) from incoming requests. WSGI and PHP frameworks normalize both variants to the same variable, allowing an authenticated low-privilege user to smuggle a forged identity that may override the legitimate authenticated identity in the upstream application.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":46.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}