CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2019-9518
High (7.5). EPSS 25% chance of exploitation in the next 30 days.
Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service. The attacker sends a stream of frames with an empty payload and without the end-of-stream flag. These frames can be DATA, HEADERS, CONTINUATION and/or PUSH_PROMISE. The peer spends time processing each frame disproportionate to attack bandwidth. This can consume excess CPU.
Severity
- EPSS
- 25% chance of exploitation in the next 30 days; higher than 97% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-770, CWE-400
- Published
- Modified
- Record from
- the NVD, synced
Affected
- apache:traffic_server
- apple:swiftnio
- canonical:ubuntu_linux
- debian:debian_linux
- fedoraproject:fedora
- mcafee:web_gateway
- nodejs:node.js
- opensuse:leap
- oracle:graalvm
- redhat:enterprise_linux
- redhat:jboss_core_services
- redhat:jboss_enterprise_application_platform
- redhat:openshift_service_mesh
- redhat:quay
- redhat:software_collections
- synology:diskstation_manager
- synology:skynas
- synology:vs960hd_firmware