CVE-2023-44487

HTTP/2 Rapid Reset Attack Vulnerability

n/a

CVSS

100.0%

EPSS (exploit prob.)

100.0%

EPSS percentile

Yes

Actively exploited

Ransomware use

2023-10-10

Added

MITRE ATT&CK techniques

How this vulnerability maps to adversary behaviour, from the Center for Threat-Informed Defense's public CVE→ATT&CK mappings. Use it to check whether your detections already cover the technique.

Technique	Name	Relationship
T1190	Exploit Public-Facing Application	exploitation technique
T1499	Endpoint Denial of Service	primary impact

Summary

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

Affected software

Vendor: IETF · Product: HTTP/2

Weakness types (CWE):

What to do

This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.

Related vulnerabilities in IETF

CVE	Name	EPSS	Exploited
CVE-2023-29552	Service Location Protocol (SLP) Denial-of-Service Vulnerability	65.9%	Yes

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