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CVE-2019-9511

Affected software7 products, listed below
Severity7.5 High CVSS 3.1 3 scores
WeaknessUncontrolled resource consumption (CWE-400)
Published13 Aug 2019
Updated17 Jun 2026

Description

Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.

CWE-770

Exploitation status

Forecast only (60% 30-day chance)

No exploit has been reported in the sources we check. EPSS puts this CVE in the top 0.86% of all scored CVEs. That is a model's forecast, not a report of exploitation.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment no assessment published
  • Indexed PoC 1 indexed, none at 5+ stars
  • EPSS 60% chance in 30 days A model's forecast, not a report of exploitation. Higher than 99% of all scored CVEs.

1 of these are GitHub repositories with fewer than 5 stars. They are listed for reference and don't count toward the exploitation status above.

IndexArtifactStarsFirst seen
GitHub PoC based on nginx 1.19.5 to fix for CVE-2018-16843, CVE-2018-16844, CVE-2019-9511, CVE-2019-9513, and CVE-2019-9516 1 2020-12-22

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

  • Protection none
  • Action not pursued none
  • Review human Researcher
  • Record active
Decided by Manual classification of this CVE in the legacy dataset
Finding A manual classification set this CVE's status to Outside Waratek scope, but the CVE names a tracked product.

CVSS

7.5 HIGH v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 3 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H NVD Primary published
CVSS 3.0 7.5 HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H cret@cert.org Secondary
CVSS 2.0 7.8 none AV:N/AC:L/Au:N/C:N/I:N/A:C NVD Primary

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update October 2019 ↗ CPU 2019-Q4 Oracle GraalVM / JavaScript (Node.js) (19.2.0)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle GraalVM JavaScript (Node.js) 19.2.0 19.2.0.0

Products and versions

20 products, 36 version entries
SourceVendorProductSchemeAffected versions
nvd apache traffic server generic ≥ 6.0.0 and ≤ 6.2.3 · ≥ 7.0.0 and ≤ 7.1.6 · ≥ 8.0.0 and ≤ 8.0.3
nvd apple swiftnio generic ≥ 1.0.0 and ≤ 1.4.0
nvd canonical ubuntu linux generic 16.04 · 18.04 · 19.04
nvd debian debian linux generic 9.0 · 10.0
nvd f5 nginx generic ≥ 1.9.5 and < 1.16.1 · ≥ 1.17.0 and ≤ 1.17.2
nvd fedoraproject fedora generic 29 · 30
nvd mcafee web gateway generic ≥ 7.7.2.0 and < 7.7.2.24 · ≥ 7.8.2.0 and < 7.8.2.13 · ≥ 8.1.0 and < 8.2.0
nvd nodejs node.js generic ≥ 8.0.0 and ≤ 8.8.1 · ≥ 8.9.0 and < 8.16.1 · ≥ 10.0.0 and ≤ 10.12.0 · ≥ 10.13.0 and < 10.16.3 · ≥ 12.0.0 and < 12.8.1
nvd opensuse leap generic 15.0 · 15.1
nvd oracle enterprise communications broker generic 3.1.0 · 3.2.0
nvd oracle graalvm javase 19.2.0
nvd redhat enterprise linux generic 8.0
nvd redhat jboss core services generic 1.0
nvd redhat jboss enterprise application platform generic 7.2.0 · 7.3.0
nvd redhat openshift service mesh generic 1.0
nvd redhat quay generic 3.0.0
nvd redhat software collections generic 1.0
nvd synology diskstation manager generic 6.2
nvd synology skynas generic any version
nvd synology vs960hd firmware generic any version

Earlier manual review

A reviewer classified this CVE in an older dataset. We kept the labels and products below, but not the reviewer's reasoning.

## Manual Classification Context **Labels:** JAVASCRIPT (NODE.JS), MULTIPLE, NO AUTH REMOTE EXPLOIT **Products:** ORACLE GRAALVM ENTERPRISE EDITION, ORACLE GRAALVM, HTTP/2

References

URLTags
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/msg00035.html Mailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00003.html Mailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00005.html Mailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00014.html Mailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2692 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2745 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2746 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2775 Third Party Advisory

Timeline

Published2019-08-13By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.