High 7.5Published Aug 13, 2019

CVE-2019-9512Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service.

Updated under an hour ago (Nov 2, 2026, 1:40 AM ET)

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It affects apple swiftnio and 3 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Start free and add your stackFree account, 3 products Every CVE for apple swiftnio Exploited in the last 30 days

Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service. The attacker sends continual pings to an HTTP/2 peer, causing the peer to build an internal queue of responses. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.

CVSS: 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-400
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

apple swiftnio apple:swiftnio	from 1.0.0 through 1.4.0	NVD
apache traffic_server apache:traffic_server	from 6.0.0 through 6.2.3; from 7.0.0 through 7.1.6; from 8.0.0 through 8.0.3	NVD
debian debian_linux debian:debian_linux	10.0	NVD
nodejs node.js nodejs:node.js	from 8.0.0 through 8.8.1; from 8.9.0 before 8.16.1; from 10.0.0 through 10.12.0; from 10.13.0 before 10.16.3; from 12.0.0 before 12.8.1	NVD

References

References

http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00076.html	mailing-list, third-party-advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00002.html	mailing-list, third-party-advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00011.html	mailing-list, third-party-advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00021.html	mailing-list, third-party-advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html	mailing-list, third-party-advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html	mailing-list, third-party-advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00038.html	mailing-list, third-party-advisory
http://seclists.org/fulldisclosure/2019/Aug/16	mailing-list, third-party-advisory
http://www.openwall.com/lists/oss-security/2019/08/20/1	mailing-list, third-party-advisory
https://access.redhat.com/errata/RHSA-2019:2594	third-party-advisory
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.