{ "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": "2026-09-03T14:21:13.840Z" }, "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 4.12", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "openshift4/ose-oauth-proxy", "defaultStatus": "affected", "versions": [ { "version": "1786458704", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "cpes": [ "cpe:/a:redhat:openshift:4.12::el9" ] }, { "vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.13", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "openshift4/ose-oauth-proxy", "defaultStatus": "affected", "versions": [ { "version": "1786477436", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "cpes": [ 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"openshift4/ose-oauth-proxy-rhel9", "defaultStatus": "affected", "versions": [ { "version": "1785544039", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "cpes": [ "cpe:/a:redhat:openshift:4.16::el9" ] }, { "vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4.17", "collectionURL": "https://catalog.redhat.com/software/containers/", "packageName": "openshift4/ose-oauth-proxy-rhel9", "defaultStatus": "affected", "versions": [ { "version": "1787543313", "lessThan": "*", "versionType": "rpm", "status": "unaffected" } ], "cpes": [ "cpe:/a:redhat:openshift:4.17::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-2026:50758", "name": "RHSA-2026:50758", "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/errata/RHSA-2026:54188", "name": "RHSA-2026:54188", "tags": [ "vendor-advisory", "x_refsource_REDHAT" ] }, { "url": "https://access.redhat.com/errata/RHSA-2026:54206", "name": "RHSA-2026:54206", "tags": [ "vendor-advisory", "x_refsource_REDHAT" ] }, { "url": "https://access.redhat.com/errata/RHSA-2026:56912", "name": "RHSA-2026:56912", "tags": [ "vendor-advisory", "x_refsource_REDHAT" ] }, { "url": 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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": "2026-09-03T14:21:13.840Z" }, "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" } } ] } }