CVE-2023-44487: HTTP/2 Rapid Reset Attack Vulnerability

Required action (CISA's text)

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Description (NVD)

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

SOURCES

• CISA KEVCISA Known Exploited Vulnerabilities catalog

Other IETF flaws

• CVE-2023-29552: Service Location Protocol (SLP) Denial-of-Service Vulnerability

Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.