CVE-2023-44487
IETF — HTTP/2 Rapid Reset Attack Vulnerability
What EVULNABLE says
EVULNABLE Risk · priority
84/100
Urgent
Intelligence coverage 75/90 — no pre-patch disclosure data
The priority band answers “how soon”, not “how bad” — see Methodology for what it weighs and where it abstains.
The evidence behind it
| Measure | Value | Source |
|---|---|---|
| CVSS base score | 7.5 | NVD |
| FIRST EPSS | 0.999 (99.99th pctl) | FIRST |
| Actively exploited | Confirmed | CISA KEV |
| Ransomware campaign use | Unknown or none | CISA KEV |
| CISA remediation deadline | 2023-10-31 — Overdue by 2.8 years | CISA KEV |
What CISA says to do
- This vulnerability affects a common open-source component, third-party library, or protocol used by different products. For more information, please see: HTTP/2 Rapid Reset Vulnerability, CVE-2023-44487 | CISA: https://www.cisa.gov/news-events/alerts/2023/10/10/http2-rapid-reset-vulnerability-cve-2023-44487
- blog.cloudflare.com/…/technical-breakdown-http2-rapid-reset-ddos-attack ↗
- nvd.nist.gov/…/CVE-2023-44487 ↗
The primary records
This page is an opinion about urgency. Where it and a source of record disagree, the source of record is the record.