Search/CVE-2019-9516
● CVE — Medium

CVE-2019-9516

Vendorredhat, debian, fedoraproject, canonical, opensuseProductjboss enterprise application platform, debian linux, fedora, ubuntu linux, enterprise linux, leap, traffic server, diskstation manager, skynas, vs960hd firmware, jboss core services, node.js, nginx, web gateway, swiftnio, software collections, openshift service mesh, graalvm, quayDiscoveredAug 13, 2019UpdatedJan 14, 2025

Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value, optionally Huffman encoded into 1-byte or greater headers. Some implementations allocate memory for these headers and keep the allocation alive until the session dies. This can consume excess memory.

CVSS v3.1
6.5 MEDIUM
EPSS
57.5%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Aug 16, 2026 → Nov 1, 2026
▲ 1.20pp
56.3% → 57.5% over 2 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
ConfidentialityNONE
IntegrityNONE
AvailabilityHIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Timeline
disclosure → media coverage
Aug 13, 2019
Disclosure — published as a CVE record. · last revised by NVD Jan 14, 2025