CVE-2019-9515

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a denial of service. The attacker sends a stream of SETTINGS frames to the peer. Since the RFC requires that the peer reply with one acknowledgement per SETTINGS frame, an empty SETTINGS frame is almost equivalent in behavior to a ping. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-400CWE-770

Affected software

VendorProductVersions
n/an/an/a

References

Timeline

Published
Aug 13, 2019
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2019-9515: High severity, CVSS 7.5 | Vulnix