{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49332","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","state":"PUBLISHED","assignerShortName":"redhat","dateReserved":"2026-05-29T13:28:56.553Z","datePublished":"2026-07-28T12:18:26.112Z","dateUpdated":"2026-08-12T15:22:29.848Z"},"containers":{"cna":{"title":"Openshift/oauth-proxy: openshift/oauth-proxy: underscore header smuggling enables identity impersonation on wsgi/php upstreams","metrics":[{"other":{"content":{"value":"Important","namespace":"https://access.redhat.com/security/updates/classification/"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N","version":"3.1"},"format":"CVSS"}],"descriptions":[{"lang":"en","value":"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 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."}],"affected":[{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4.14","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"openshift4/ose-oauth-proxy","defaultStatus":"affected","versions":[{"version":"1785549818","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:openshift:4.14::el9"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4.18","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"openshift4/ose-oauth-proxy-rhel9","defaultStatus":"affected","versions":[{"version":"1785529735","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:openshift:4.18::el9"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4.19","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"openshift4/ose-oauth-proxy-rhel9","defaultStatus":"affected","versions":[{"version":"1785521728","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:openshift:4.19::el9"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4.20","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"openshift4/ose-oauth-proxy-rhel9","defaultStatus":"affected","versions":[{"version":"1785833742","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:openshift:4.20::el9"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4.21","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"openshift4/ose-oauth-proxy-rhel9","defaultStatus":"affected","versions":[{"version":"1785851359","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:openshift:4.21::el9"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4.22","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"openshift4/ose-oauth-proxy-rhel9","defaultStatus":"affected","versions":[{"version":"1785885351","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:openshift:4.22::el9"]}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:50681","name":"RHSA-2026:50681","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:51007","name":"RHSA-2026:51007","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:51013","name":"RHSA-2026:51013","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:51022","name":"RHSA-2026:51022","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:51025","name":"RHSA-2026:51025","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:51038","name":"RHSA-2026:51038","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-49332","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2483253","name":"RHBZ#2483253","tags":["issue-tracking","x_refsource_REDHAT"]}],"datePublic":"2026-07-28T12:00:00.000Z","problemTypes":[{"descriptions":[{"cweId":"CWE-436","description":"Interpretation Conflict","lang":"en","type":"CWE"}]}],"x_redhatCweChain":"CWE-436: Interpretation Conflict","workarounds":[{"lang":"en","value":"Upstream application hardening: validate X-Forwarded-User against the expected session identity. Reject requests where identity headers do not match the authenticated session."}],"timeline":[{"lang":"en","time":"2026-04-17T00:00:00.000Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-07-28T12:00:00.000Z","value":"Made public."}],"credits":[{"lang":"en","value":"This issue was discovered by Jeremy Choi (Red Hat)."}],"providerMetadata":{"orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","shortName":"redhat","dateUpdated":"2026-08-12T15:22:29.848Z"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-28T13:02:35.727357Z","id":"CVE-2026-49332","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-28T13:03:08.605Z"}}]}}