CVE-2026-33244

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{"bugzilla": {"description": "react-router: React Router: Cross-Site Scripting (XSS) via improper HTTP Location header neutralization", "id": "2484045", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2484045"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-79", "details": ["React Router is a router for React. In versions 7.5.1 through 7.13.1, when using Framework Mode with pre-rendering enabled, improper neutralization of the HTTP `Location` header value can permit Cross-Site Scripting (XSS) in the statically generated HTML files if the redirect location comes from an untrusted source. This does not impact applications using Declarative Mode (`<BrowserRouter>`) or Data Mode (`createBrowserRouter/<RouterProvider>`). This is patched in version 7.13.2.", "A flaw was found in react-router. When using Framework Mode with pre-rendering enabled, an attacker can exploit improper handling of the HTTP `Location` header value. This can lead to Cross-Site Scripting (XSS), allowing malicious scripts to be injected into statically generated HTML files if the redirect location originates from an untrusted source."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, Red Hat customers should ensure that applications utilizing React Router avoid Framework Mode with pre-rendering enabled, particularly when handling redirect locations from untrusted sources. If this mode is essential, strict validation and sanitization of all input used in redirect URLs are required. Applications configured with Declarative Mode (`<BrowserRouter>`) or Data Mode (`createBrowserRouter/<RouterProvider>`) are not susceptible to this flaw."}, "name": "CVE-2026-33244", "package_state": [{"cpe": "cpe:/a:redhat:cryostat:4", "fix_state": "Under investigation", "package_name": "cryostat-openshift-console-plugin-npm", "product_name": "Cryostat 4"}, {"cpe": "cpe:/a:redhat:cryostat:4", "fix_state": "Under investigation", "package_name": "grafana-infinity-datasource-npm", "product_name": "Cryostat 4"}, {"cpe": "cpe:/a:redhat:cryostat:4", "fix_state": "Under investigation", "package_name": "react-router", "product_name": "Cryostat 4"}, {"cpe": "cpe:/a:redhat:exploit_intelligence:0", "fix_state": "Under investigation", "package_name": "exploit-intelligence-tech-preview/agent-client-rhel9", "product_name": "Exploit Intelligence"}, {"cpe": "cpe:/a:redhat:gatekeeper:3", "fix_state": "Under investigation", "package_name": "gatekeeper/gatekeeper-rhel9", "product_name": "Gatekeeper 3"}, 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"cpe:/a:redhat:quay:3", "fix_state": "Under investigation", "package_name": "quay/quay-rhel8", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Under investigation", "package_name": "quay/quay-rhel9", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Under investigation", "package_name": "nodejs-react-router", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Under investigation", "package_name": "nodejs-react-router-dom", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Under investigation", "package_name": "satellite/iop-advisor-frontend-rhel9", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Under investigation", "package_name": "satellite/iop-host-inventory-frontend-rhel9", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Under investigation", "package_name": "satellite/iop-vulnerability-frontend-rhel9", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:red_hat_single_sign_on:7", "fix_state": "Under investigation", "package_name": "react-router", "product_name": "Red Hat Single Sign-On 7"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Under investigation", "package_name": "rhtas/rhtas-console-ui-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}, {"cpe": "cpe:/a:redhat:trusted_profile_analyzer:2", "fix_state": "Under investigation", "package_name": "rhtpa/rhtpa-trustification-service-rhel9", "product_name": "Red Hat Trusted Profile Analyzer"}, {"cpe": "cpe:/a:redhat:ansible_portal:2", "fix_state": "Under investigation", "package_name": "ansible-automation-platform/automation-portal", "product_name": "Self-service automation portal 2"}], "public_date": "2026-06-02T16:59:31Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-33244\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-33244\nhttps://github.com/remix-run/react-router/security/advisories/GHSA-f22v-gfqf-p8f3"], "statement": "This Moderate flaw in `react-router` affects applications using Framework Mode with pre-rendering enabled, allowing cross-site scripting (XSS). An untrusted HTTP `Location` header can inject malicious scripts into statically generated HTML. Red Hat products are only vulnerable if deployed with this specific configuration, as Declarative Mode and Data Mode applications are unaffected.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[7.5.1,7.13.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "react-router", "source": "cna", "vendor": "remix-run"}, "product": "react-router", "vendor": "remix-run"}], "created": "2026-06-02T18:30:15.028268+00:00", "updated": "2026-06-02T20:50:50.154273+00:00", "vendors": ["remix-run", "remix-run$PRODUCT$react-router"]}