CVE-2018-1000168

HIGHEPSS 96th pctl

7.5

CVSS v3

Description

nghttp2 version >= 1.10.0 and nghttp2 <= v1.31.0 contains an Improper Input Validation CWE-20 vulnerability in ALTSVC frame handling that can result in segmentation fault leading to denial of service. This attack appears to be exploitable via network client. This vulnerability appears to have been fixed in >= 1.31.1.

CWE-20Improper Input Validation CWE-476NULL Pointer Dereference

How to fix

Remediation Available

libnghttp2Amazon

Fixed in:0:1.31.1-1.amzn2

libnghttp2-develAmazon

Fixed in:0:1.31.1-1.amzn2

nghttp2Amazon

Fixed in:0:1.31.1-1.amzn2

nghttp2-debuginfoAmazon

Fixed in:0:1.31.1-1.amzn2

nghttp2Debian

Fixed in:1.31.1-1CVE-2018-1000168

Node.jsWindows application

Affected:10.0.0 10.4.1Fixed in:10.4.1Node.js Foundation

Node.js (LTS)Windows application

Affected:10.0.0 10.4.1Fixed in:10.4.1Node.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

10.65%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

References

Vendor Advisory1

nghttp2.org

Third-Party Advisory5

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix

Common questions

How do I fix CVE-2018-1000168?

Published advisories record a fix for 7 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-2018-1000168 being actively exploited?

Not that we know of. CVE-2018-1000168 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 10.6% is the estimated probability that it will be exploited in the next 30 days. That is higher than 96% of all scored CVEs.

How severe is CVE-2018-1000168?

CVE-2018-1000168 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-2018-1000168 affect?

Published advisories record a fix for libnghttp2 (Amazon), libnghttp2-devel (Amazon), nghttp2 (Amazon), nghttp2-debuginfo (Amazon), and 3 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2018-1000168

Markdown

[![CVE-2018-1000168](https://tridentstack.com/cve/badge/CVE-2018-1000168.svg)](https://tridentstack.com/cve/CVE-2018-1000168)

HTML

<a href="https://tridentstack.com/cve/CVE-2018-1000168"><img src="https://tridentstack.com/cve/badge/CVE-2018-1000168.svg" alt="CVE-2018-1000168"></a>

Check your Linux endpoints for this class of vulnerability

TridentStack Control continuously scans Linux endpoints for known vulnerabilities and deploys the fixes from the same console. 200 endpoints free forever, no credit card.

Patch your fleet free Start freeThis CVE lookup is free and always will be.

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.