CVE-2026-112085

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{"bugzilla": {"description": "webpack-dev-server: webpack-dev-server: unauthorized backend access via unvalidated WebSocket proxy requests", "id": "2558804", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2558804"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.2", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N", "status": "draft"}, "cwe": "CWE-940", "details": ["A flaw was found in webpack-dev-server. When configured to forward WebSocket connections through a proxy, the server does not validate incoming Host or Origin headers on connection upgrade requests. A remote attacker could exploit this by enticing a user to visit a malicious website, enabling the site to establish unauthorized cross-origin connections to backend services through the local server. Consequently, the attacker can read from and write to internal backend services that would otherwise be protected."], "name": "CVE-2026-112085", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "prometheus3.13", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-10-22T09:31:59Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-112085\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-112085\nhttps://cna.openjsf.org/security-advisories.html\nhttps://github.com/webpack/webpack-dev-server/security/advisories/GHSA-cfqc-fj3v-j925"], "threat_severity": "Important"}

{"created": "2026-10-22T11:30:05.661915+00:00", "updated": "2026-10-23T04:00:12.781494+00:00", "vendors": []}