CVE-2019-9513

HIGHEPSS 100th pctl

7.5

CVSS v3

Description

Some HTTP/2 implementations are vulnerable to resource loops, potentially leading to a denial of service. The attacker creates multiple request streams and continually shuffles the priority of the streams in a way that causes substantial churn to the priority tree. This can consume excess CPU.

CWE-400Resource Exhaustion

How to fix

Remediation Available

libnghttp2Amazon

Fixed in:0:1.39.2-1.amzn2

libnghttp2-develAmazon

Fixed in:0:1.39.2-1.amzn2

nghttp2Amazon

Fixed in:0:1.39.2-1.amzn2

nghttp2-debuginfoAmazon

Fixed in:0:1.39.2-1.amzn2

nghttp2Debian

Fixed in:1.39.2-1CVE-2019-9513

libnghttp2-14Ubuntu

Fixed in:1.7.1-1ubuntu0.1~esm2USN-6754-1

This Ubuntu release reached end-of-life on 2021-04-02.

Fixed in:1.30.0-1ubuntu1+esm2USN-6754-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

Fixed in:1.40.0-1ubuntu0.3USN-6754-1

This Ubuntu release reached end-of-life on 2025-05-31. Extended security maintenance is available until 2030-04-02.

Fixed in:1.43.0-1ubuntu0.2USN-6754-1

Fixed in:1.55.1-1ubuntu0.2USN-6754-1

This Ubuntu release reached end-of-life on 2024-07-12.

nghttp2Ubuntu

Fixed in:1.7.1-1ubuntu0.1~esm2USN-6754-1

This Ubuntu release reached end-of-life on 2021-04-02.

Fixed in:1.30.0-1ubuntu1+esm2USN-6754-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

Fixed in:1.40.0-1ubuntu0.3USN-6754-1

This Ubuntu release reached end-of-life on 2025-05-31. Extended security maintenance is available until 2030-04-02.

Fixed in:1.43.0-1ubuntu0.2USN-6754-1

Fixed in:1.55.1-1ubuntu0.2USN-6754-1

This Ubuntu release reached end-of-life on 2024-07-12.

nghttp2-clientUbuntu

Fixed in:1.7.1-1ubuntu0.1~esm2USN-6754-1

This Ubuntu release reached end-of-life on 2021-04-02.

Fixed in:1.30.0-1ubuntu1+esm2USN-6754-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

Fixed in:1.40.0-1ubuntu0.3USN-6754-1

This Ubuntu release reached end-of-life on 2025-05-31. Extended security maintenance is available until 2030-04-02.

Fixed in:1.43.0-1ubuntu0.2USN-6754-1

Fixed in:1.55.1-1ubuntu0.2USN-6754-1

This Ubuntu release reached end-of-life on 2024-07-12.

nghttp2-proxyUbuntu

Fixed in:1.7.1-1ubuntu0.1~esm2USN-6754-1

This Ubuntu release reached end-of-life on 2021-04-02.

Fixed in:1.30.0-1ubuntu1+esm2USN-6754-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

Fixed in:1.40.0-1ubuntu0.3USN-6754-1

This Ubuntu release reached end-of-life on 2025-05-31. Extended security maintenance is available until 2030-04-02.

Fixed in:1.43.0-1ubuntu0.2USN-6754-1

Fixed in:1.55.1-1ubuntu0.2USN-6754-1

This Ubuntu release reached end-of-life on 2024-07-12.

nghttp2-serverUbuntu

Fixed in:1.7.1-1ubuntu0.1~esm2USN-6754-1

This Ubuntu release reached end-of-life on 2021-04-02.

Fixed in:1.30.0-1ubuntu1+esm2USN-6754-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

Fixed in:1.40.0-1ubuntu0.3USN-6754-1

This Ubuntu release reached end-of-life on 2025-05-31. Extended security maintenance is available until 2030-04-02.

Fixed in:1.43.0-1ubuntu0.2USN-6754-1

Fixed in:1.55.1-1ubuntu0.2USN-6754-1

This Ubuntu release reached end-of-life on 2024-07-12.

nginxUbuntu

Fixed in:1.10.3-0ubuntu0.16.04.4USN-4099-1

This Ubuntu release reached end-of-life on 2021-04-02.

Fixed in:1.14.0-0ubuntu1.4USN-4099-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

nginx-commonUbuntu

Fixed in:1.10.3-0ubuntu0.16.04.4USN-4099-1

This Ubuntu release reached end-of-life on 2021-04-02.

Fixed in:1.14.0-0ubuntu1.4USN-4099-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

nginx-coreUbuntu

Fixed in:1.10.3-0ubuntu0.16.04.4USN-4099-1

This Ubuntu release reached end-of-life on 2021-04-02.

Fixed in:1.14.0-0ubuntu1.4USN-4099-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

nginx-extrasUbuntu

Fixed in:1.10.3-0ubuntu0.16.04.4USN-4099-1

This Ubuntu release reached end-of-life on 2021-04-02.

Fixed in:1.14.0-0ubuntu1.4USN-4099-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

nginx-fullUbuntu

Fixed in:1.10.3-0ubuntu0.16.04.4USN-4099-1

This Ubuntu release reached end-of-life on 2021-04-02.

Fixed in:1.14.0-0ubuntu1.4USN-4099-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

nginx-lightUbuntu

Fixed in:1.10.3-0ubuntu0.16.04.4USN-4099-1

This Ubuntu release reached end-of-life on 2021-04-02.

Fixed in:1.14.0-0ubuntu1.4USN-4099-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

Node.jsWindows application

Affected:8.9.0 8.16.1Fixed in:8.16.1Node.js Foundation

Affected:10.13.0 10.16.3Fixed in:10.16.3Node.js Foundation

Affected:12.0.0 12.8.1Fixed in:12.8.1Node.js Foundation

Node.js (LTS)Windows application

Affected:8.9.0 8.16.1Fixed in:8.16.1Node.js Foundation

Affected:10.13.0 10.16.3Fixed in:10.16.3Node.js Foundation

Affected:12.0.0 12.8.1Fixed in:12.8.1Node.js Foundation

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

81.56%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

References

Related Vulnerabilities

Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-44487	High	7.5	100%	KEV	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2011-3192	High	7.8	99%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2023-21547	High	7.5	89%	-	Fix
CVE-2018-1000115	High	7.5	88%	-	Fix

Common questions

How do I fix CVE-2019-9513?

Published advisories record a fix for 18 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2019-9513 being actively exploited?

Not that we know of. CVE-2019-9513 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 81.6% is the estimated probability that it will be exploited in the next 30 days. That is higher than 100% of all scored CVEs.

How severe is CVE-2019-9513?

CVE-2019-9513 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2019-9513 affect?

Published advisories record a fix for libnghttp2 (Amazon), libnghttp2-devel (Amazon), nghttp2 (Amazon), nghttp2-debuginfo (Amazon), and 14 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.