{"id":"EUVD-2026-101959","revision":"3ec7afa676b2472e8bdefc4ff46e1833","records":[{"revision":"3ec7afa676b2472e8bdefc4ff46e1833","observedAt":"2026-10-28T00:52:18.813+00:00","statement":{"source":"euvd","id":"EUVD-2026-101959","aliases":["CVE-2026-109855","GHSA-qq8j-7v2v-3rwp"],"title":"undici WebSocket client vulnerable to Denial of Service via failed HTTP/2 handshake","description":"undici WebSocket client vulnerable to Denial of Service via failed HTTP/2 handshake","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":null}],"references":["https://github.com/nodejs/undici/security/advisories/GHSA-qq8j-7v2v-3rwp","https://cna.openjsf.org/security-advisories.html","https://nvd.nist.gov/vuln/detail/CVE-2026-109855","https://github.com/nodejs/undici/pull/5873","https://github.com/nodejs/undici/commit/dd28c5c55f4a25f7c441fd4365b1191f96c3b8bf","https://github.com/nodejs/undici/releases/tag/v8.11.2"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-101959","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 27, 2026, 4:09:45 PM","dateUpdated":"Oct 27, 2026, 4:09:45 PM"},"relatedAdvisories":[{"id":"RHSA-2026:76677","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","vulnerabilityIds":["CVE-2024-24786","CVE-2026-56851","CVE-2026-61801","CVE-2026-95502","CVE-2026-97394","CVE-2026-100347","CVE-2026-100348","CVE-2026-100349","CVE-2026-100350","CVE-2026-100351","CVE-2026-101899","CVE-2026-109855"]},{"id":"RHSA-2026:83198","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","vulnerabilityIds":["CVE-2026-109855"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-101959","identifiers":["EUVD-2026-101959","CVE-2026-109855","GHSA-qq8j-7v2v-3rwp"]},"retained":false,"historicalAffected":[]}],"coverage":[]}