All vulnerabilities
CVE-2023-44487GHSA-2m7v-gc89-fjqfGHSA-vx74-f528-fxqgGHSA-xpw8-rcwv-8f8p

HTTP/2 Rapid Reset Attack Vulnerability

IETF HTTP/2
Open in ThreatlineRecord JSON
CVSS
7.5High
ExploitationExploited in the wildAdded to KEV 10 Oct 2023CISA KEV
Exploit odds (EPSS)>99.9%Chance of exploitation activity in the next 30 days, higher than 99.9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline31 Oct 2023Remediation due date for US federal agenciesCISA KEV
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 10 Oct 2023, 00:00 UTCPublishedCVE List
  2. 10 Oct 2023Added to CISA KEVCISA KEV
  3. 16 Sep 2025Exploit code publicExploit-DB

Public exploit code and templates 1

  • Remote exploitHTTP/2 2.0 - Denial Of Service (DOS) 16 Sep 2025Exploit-DB

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

HTTP/2 contains a rapid reset vulnerability that allows for a distributed denial-of-service attack (DDoS).

Text from CVE List

Affected versions 1

  • n/aaffected: n/aCVE List

References 85