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CVE-2018-1000168· NVD / CVE Program· CNA mitre

nghttp2 version >= 1.10.0 and nghttp2 <= v1.31.0 contains an Improper Input Validation CWE-20 vulnerability in ALTSVC frame handling that ca

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.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
May 8, 2018
Updated
Jun 16, 2026
EPSS
10.6% · 96th percentile
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Report tools

JSON

Action score

33

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
3 / 30 · 10.6%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Noroxi analysis

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Affected systems

VendorProduct
nghttp2nghttp2
nodejsnode.js
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • nodejs node.js6.0.0 and later · up to 6.8.1 inclusive
  • nodejs node.js8.4.0 and later · up to 8.17.0 inclusive
  • nodejs node.js9.0.0 and later · up to 9.11.2 inclusive
  • nodejs node.js10.0.0 and later · before 10.4.1

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.10nodejsbefore 8.11.3-r08.11.3-r0
Debian:12nghttp2before 1.31.1-11.31.1-1
Debian:9nghttp2before 1.18.1-1+deb9u21.18.1-1+deb9u2
openSUSE:Tumbleweednghttp2before 1.43.0-1.61.43.0-1.6
Red Hat:jboss_core_services:1::el6jbcs-httpd24before 0:1-6.jbcs.el60:1-6.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apache-commons-daemon-jsvcbefore 1:1.1.0-3.redhat_2.jbcs.el61:1.1.0-3.redhat_2.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apache-commons-daemon-jsvc-debuginfobefore 1:1.1.0-3.redhat_2.jbcs.el61:1.1.0-3.redhat_2.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-aprbefore 0:1.6.3-31.jbcs.el60:1.6.3-31.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-debuginfobefore 0:1.6.3-31.jbcs.el60:1.6.3-31.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-develbefore 0:1.6.3-31.jbcs.el60:1.6.3-31.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-utilbefore 0:1.6.1-24.jbcs.el60:1.6.1-24.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-util-debuginfobefore 0:1.6.1-24.jbcs.el60:1.6.1-24.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-util-develbefore 0:1.6.1-24.jbcs.el60:1.6.1-24.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-util-ldapbefore 0:1.6.1-24.jbcs.el60:1.6.1-24.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-util-mysqlbefore 0:1.6.1-24.jbcs.el60:1.6.1-24.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-util-nssbefore 0:1.6.1-24.jbcs.el60:1.6.1-24.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-util-odbcbefore 0:1.6.1-24.jbcs.el60:1.6.1-24.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-util-opensslbefore 0:1.6.1-24.jbcs.el60:1.6.1-24.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-util-pgsqlbefore 0:1.6.1-24.jbcs.el60:1.6.1-24.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-util-sqlitebefore 0:1.6.1-24.jbcs.el60:1.6.1-24.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-httpdbefore 0:2.4.29-35.jbcs.el60:2.4.29-35.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-httpd-debuginfobefore 0:2.4.29-35.jbcs.el60:2.4.29-35.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-httpd-develbefore 0:2.4.29-35.jbcs.el60:2.4.29-35.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-httpd-manualbefore 0:2.4.29-35.jbcs.el60:2.4.29-35.jbcs.el6

+66

Same product

nghttp2: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-28182Reading unbounded number of HTTP/2 CONTINUATION frames to cause excessive CPU usage
    46Plan
  • CVE-2015-8659The idle stream handling in nghttp2 before 1.6.0 allows attackers to have unspecified impact via unknown vectors, aka a heap-use-after-free
    41Plan
  • CVE-2020-11080Denial of service in nghttp2
    32Monitor
  • CVE-2026-27135nghttp2 Denial of service: Assertion failure due to the missing state validation
    30Monitor
  • CVE-2026-58055nghttp2 nghttpx - HTTP Request/Response Smuggling via Upgrade Request with Content-Length
    25Monitor
  • CVE-2016-1544nghttp2 before 1.7.1 allows remote attackers to cause a denial of service (memory exhaustion).
    13Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
alpine:nodejs8.11.3-r0 · Alpine:v3.10Package registry (OSV)
debian:nghttp21.31.1-1 · Debian:12Package registry (OSV)
opensuse:nghttp21.43.0-1.6 · openSUSE:TumbleweedPackage registry (OSV)
red hat:jbcs-httpd240:1-6.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apache-commons-daemon-jsvc1:1.1.0-3.redhat_2.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apache-commons-daemon-jsvc-debuginfo1:1.1.0-3.redhat_2.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr0:1.6.3-31.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-debuginfo0:1.6.3-31.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-devel0:1.6.3-31.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-util0:1.6.1-24.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-util-debuginfo0:1.6.1-24.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-util-devel0:1.6.1-24.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-util-ldap0:1.6.1-24.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-util-mysql0:1.6.1-24.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-util-nss0:1.6.1-24.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
suse:nghttp21.39.2-3.5.1 · SUSE:HPE Helion OpenStack 8Package registry (OSV)
suse:nodejs88.11.3-3.5.1 · SUSE:Linux Enterprise Module for Web and Scripting 15Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records