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Public proof of conceptFix available

CVE-2024-37890

A public proof of concept exists; no exploitation attested.

  • Published2024-06-17
  • Fixed in8.17.1 · 7.5.10 · 6.2.3 · 5.2.4
  • WeaknessCWE-476

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

ws is an open source WebSocket client and server for Node.js. A request with a number of headers exceeding theserver.maxHeadersCount threshold could be used to crash a ws server. The vulnerability was fixed in ws@8.17.1 (e55e510) and backported to ws@7.5.10 (22c2876), ws@6.2.3 (eeb76d3), and ws@5.2.4 (4abd8f6). In vulnerable versions of ws, the issue can be mitigated in the following ways: 1. Reduce the maximum allowed length of the request headers using the --max-http-header-size=size and/or the maxHeaderSize options so that no more headers than the server.maxHeadersCount limit can be sent. 2. Set server.maxHeadersCount to 0 so that no limit is applied.

Timeline

dates in UTC
  1. 2024-06-1720:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-37890?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-37890?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

CISA-ADP · OSV
Websockets ws
BranchAffectedFixed in
8.17< 8.17.18.17.1
8.x≥ 8.0.0, < 8.17.18.17.1
7.5< 7.5.107.5.10
7.x≥ 7.0.0, < 7.5.107.5.10
6.2< 6.2.36.2.3
6.x≥ 6.0.0, < 6.2.36.2.3
5.2< 5.2.45.2.4
5.2≥ 2.1.0, < 5.2.45.2.4
2.1= 2.1.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • RHSA-2025:8551 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.14.18 Bug Fix Update

  • RHSA-2025:8544 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.15.14 Bug Fix Update

  • RHSA-2024:6755 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.16.2 security and bug fix update

  • RHSA-2024:4591 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.16.0 security, enhancement & bug fix update

Full record on NVD

Fix

  1. Update Websockets ws to 8.17.1 · 7.5.10 · 6.2.3 · 5.2.4
  2. Vendor fix Red Hat Product Security RHSA-2025:8551 · 3 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  3. Vendor fix Red Hat Product Security RHSA-2024:6755 · 3 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  4. Workaround from the vendor Red Hat Product Security RHSA-2025:8551 · 89 productsThe issue can be mitigated by reducing the maximum allowed length of the request headers using the --max-http-header-size=size or the maxHeaderSize options so that no more headers than the server.maxHeadersCount limit can be sent. The issue can be mitigated also by seting server.maxHeadersCount to …

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionpoc2024-06-18
  • OpenCVESSVC decisionpoc—
  • CNACVSS 3.17.5read 2026-10-23
  • CNAweakness (CWE)CWE-476read 2026-10-23
  • FIRST EPSSEPSS score1.4 %2026-10-22
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2024-06-17
Last Modified
2026-06-17
NVD status
Deferred

Frequently asked questions

What is CVE-2024-37890?

ws is an open source WebSocket client and server for Node.js. A request with a number of headers exceeding theserver.maxHeadersCount threshold could be used to crash a ws server. The vulnerability was fixed in ws@8.17.1 (e55e510) and backported to ws@7.5.10 (22c2876), ws@6.2.3 (eeb76d3), and ws@5.2.4 (4abd8f6). In vulnerable versions of ws, the issue can be mitigated in the following ways: 1. Reduce the maximum allowed length of the request headers using the --max-http-header-size=size and/or the maxHeaderSize options so that no more headers than the server.maxHeadersCount limit can be sent. 2. Set server.maxHeadersCount to 0 so that no limit is applied.

Is CVE-2024-37890 actively exploited?

A proof-of-concept exploit exists for CVE-2024-37890, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2024-37890?

CVE-2024-37890 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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