{"id":"CVE-2024-27983","url":"https://www.cyber-defence.io/tools/cve/CVE-2024-27983","generatedAt":"2026-11-04T22:05:08.291Z","title":"An attacker can make the Node.js HTTP/2 server completely unavailable by sending a small amount of HTTP/2 frames packets with a few HTTP/2 frames inside.","description":"An attacker can make the Node.js HTTP/2 server completely unavailable by sending a small amount of HTTP/2 frames packets with a few HTTP/2 frames inside. It is possible to leave some data in nghttp2 memory after reset when headers with HTTP/2 CONTINUATION frame are sent to the server and then a TCP connection is abruptly closed by the client triggering the Http2Session destructor while header frames are still being processed (and stored in memory) causing a race condition.","published":"2024-04-09T01:15:49.000Z","lastModified":"2026-06-17T07:20:43.000Z","status":"Deferred","sourceIdentifier":"support@hackerone.com","cvss":{"version":"3.0","score":8.2,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"},"cwe":["CWE-362"],"affected":[],"epss":{"score":0.87211,"percentile":0.99751,"date":"2026-11-03","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 87.2%, higher than 100% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://www.openwall.com/lists/oss-security/2024/04/03/16","source":"support@hackerone.com"},{"url":"https://hackerone.com/reports/2319584","source":"support@hackerone.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JDECX4BYZLMM4S4LALN4DPZ2HUTTPLKE/","source":"support@hackerone.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YDVFUH7ACZPYB3BS4SVILNOY7NQU73VW/","source":"support@hackerone.com"},{"url":"https://security.netapp.com/advisory/ntap-20240510-0002/","source":"support@hackerone.com"},{"url":"http://www.openwall.com/lists/oss-security/2024/04/03/16","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://hackerone.com/reports/2319584","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/09/msg00029.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JDECX4BYZLMM4S4LALN4DPZ2HUTTPLKE/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YDVFUH7ACZPYB3BS4SVILNOY7NQU73VW/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20240510-0002/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.kb.cert.org/vuls/id/421644","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2024-27983","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}