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CVE-2018-12121

HIGH
7.5
CVSS Score
Published: November 28, 2018 at 05:00 PM UTC
Updated: October 8, 2026 at 10:16 PM UTC
8 products affected across 2 vendorsEnterprise LinuxEnterprise Linux DesktopEnterprise Linux Server

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Severity
HIGH7.5
Exploit prediction
EPSS 10%
SSVC
No known exploit

Description

Node.js: All versions prior to Node.js 6.15.0, 8.14.0, 10.14.0 and 11.3.0: Denial of Service with large HTTP headers: By using a combination of many requests with maximum sized headers (almost 80 KB per connection), and carefully timed completion of the headers, it is possible to cause the HTTP server to abort from heap allocation failure. Attack potential is mitigated by the use of a load balancer or other proxy layer.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Node.js· Node.js
95%
10.0.0 ≤ v < 10.14.011.0.0 ≤ v < 11.3.06.0.0 ≤ v < 6.15.08.0.0 ≤ v < 8.14.0*All versions prior to Node.js 6.15.0, 8.14.0, 10.14.0 and 11.3.0
Affected range stops below 10.14.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 11.3.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.15.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.14.0, so it looks safe — our inference, not a vendor statement
Enterprise Linux· Red Hatrpm
95%
8.0
Enterprise Linux Desktop· Red Hatrubygems
95%
7.0
Enterprise Linux Eus· Red Hatrpm
95%
8.18.28.48.6
Enterprise Linux Server· Red Hatrubygems
95%
7.0
Enterprise Linux Server Aus· Red Hatrubygems
95%
8.28.48.6
Enterprise Linux Server Tus· Red Hatrubygems
95%
8.28.48.6
Enterprise Linux Workstation· Red Hatrubygems
95%
7.0

References (7)

VDB Entryx_refsource_BIDThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/106043
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2019:1821
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2019:2258
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2019:3497
x_refsource_CONFIRMPatchVendor Advisory
Source: [email protected]
https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/
Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202003-48
Source: af854a3a-2127-422b-91ae-364da2661108
https://security.netapp.com/advisory/ntap-20241227-0008/

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

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