CVE-2023-44487
HTTP/2 Rapid Reset Attack Vulnerability
- Published
- Oct 10, 2023
- Updated
- Jul 14, 2026
- Assigning CNA
- mitre
- Evidence observed
- Oct 10, 2023
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HHigh · next 30 days
- Percentile
- 100.0%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.
Sources
25POC for CVE-2023-44487
Advanced CVE-2023-44487 HTTP/2 Rapid Reset vulnerability exploitation framework. Features multi-connection concurrent attacks, adaptive rate control, stealth mode with randomized headers, real-time metrics, and risk assessment reporting. For authorized penetration testing only. By Sudeepa Wanigarathna
Python-based testing tool for CVE-2023-44487 (HTTP/2 Rapid Reset) with multiple attack patterns, granular configuration, and monitoring for authorized security assessments.
Responsible use
Use vulnerability information only on systems you own or are authorized to test. Kitploit links to public research metadata and does not store exploit code or malicious payloads.