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Fencer Vulns
critical 9.1

CVE-2018-3739 json

Denial of Service in https-proxy-agent

published 2018-06-07 8 y ago modified 2026-09-10 1 mo ago also GHSA-8g7p-74h8-hg48 , EUVD-2018-0249

cvss
9.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

https-proxy-agent before 2.1.1 passes auth option to the Buffer constructor without proper sanitization, resulting in DoS and uninitialized memory leak in setups where an attacker could submit typed input to the 'auth' parameter (e.g. JSON).

Patch / fix

  • npm https-proxy-agent 2.2.0
  • https-proxy-agent_project https-proxy-agent 2.2.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-3739 updated cvss 8.2

nodejs-https-proxy-agent: Unsanitized options passed to Buffer() allow for denial of service

  • Red Hat Quay 3 quay/quay-rhel8
    affected: no fix available “Fix deferred”
  • Red Hat Software Collections rh-nodejs8-npm, rh-nodejs8-nodejs
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 npm, nodejs, nodejs-libs, nodejs-nodemon, nodejs-full-i18n, nodejs-packaging, +1 more Red Hat Mobile Application Platform 4 nodejs-https-proxy-agent Red Hat Software Collections rh-nodejs10-npm, rh-nodejs10-nodejs
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.74% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • hackerone.com https://hackerone.com/reports/319532 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 9.1 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:P/I:N/A:P
GitHub 3.0 9.1 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected packages

ecosystem package affected fixed in
npm https-proxy-agent
<2.2.0
2.2.0

Affected products

  • HackerOne https-proxy-agent node module

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-125 Out-of-bounds Read

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.