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Public proof of conceptFix available

CVE-2024-21536

A public proof of concept exists; no exploitation attested.

  • Published2024-10-19
  • Fixed in3.0.3 · 2.0.7
  • WeaknessCWE-400

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

Versions of the package http-proxy-middleware before 2.0.7, from 3.0.0 and before 3.0.3 are vulnerable to Denial of Service (DoS) due to an UnhandledPromiseRejection error thrown by micromatch. An attacker could kill the Node.js process and crash the server by making requests to certain paths.

Timeline

dates in UTC
  1. 2024-10-1905:15CVE publishedNVD

Versions per branch

NVD · CISA-ADP · OSV
Chimurai http-proxy-middleware
BranchAffectedFixed in
3.0≥ 3.0.0, < 3.0.33.0.3
2.0< 2.0.72.0.7

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

Products declared by the CNA2 products

As snyk, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • http-proxy-middleware
    Affected
    • < 2.0.7fixed in 2.0.7semver
    • ≥ 3.0.0, < 3.0.3fixed in 3.0.3semver
  • org.webjars.npm:http-proxy-middleware
    Affected
    • all versionsno fix statedsemver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-08-02

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.

Packages

  • @rootio/http-proxy-middlewareRoot:npmall versions · fixed in 0.19.1-root.io.1
  • @rootio/http-proxy-middlewareRoot:npmall versions · fixed in 0.19.1-root.io.2
  • @rootio/http-proxy-middlewareRoot:npmall versions · fixed in 0.19.1-root.io.3
  • @rootio/http-proxy-middlewareRoot:npmall versions · fixed in 1.3.1-root.io.1
  • @rootio/http-proxy-middlewareRoot:npmall versions · fixed in 2.0.3-root.io.1
  • @rootio/http-proxy-middlewareRoot:npmall versions · fixed in 2.0.7-root.io.1
  • arangodb-3.11Chainguardall versions · fixed in 3.11.14.5-r20
  • argo-workflowsWolfiall versions · fixed in 3.6.5-r2

17 more package ranges on OSV.dev

Vendor advisories

  • CVE-2024-21536 Red Hat Product Security253 products fixed · 58 known affected

    http-proxy-middleware: http-proxy-middleware: Denial of Service via unhandled error during path matching

    io.cryostat-cryostat3.src as a component of Cryostat 3 · openshift-logging/logging-view-plugin-rhel8 as a component of Logging Subsystem for Red Hat OpenShift · mta/mta-cli-rhel9 as a component of Migration Toolkit for Applications 7 · +55 more

  • RHSA-2025:10853 Red Hat Product Security8 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.19.0

  • RHSA-2025:9294 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.17.2

  • RHSA-2025:8551 Red Hat Product Security9 products fixed

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

  • RHSA-2025:8544 Red Hat Product Security9 products fixed

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

  • RHSA-2025:8510 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Migration Toolkit for Containers (MTC) 1.8.7 security and bug fix update

16 more advisories

Full record on NVD

Fix

  1. Update Chimurai http-proxy-middleware to 3.0.3 · 2.0.7
  2. Vendor fix Red Hat Product Security RHSA-2025:10853 · 8 productsRed Hat OpenShift Pipelines is a cloud-native, continuous integration and continuous delivery (CI/CD) solution based on Kubernetes resources. It uses Tekton building blocks to automate deployments across multiple platforms by abstracting away the underlying implementation details. Tekton introduces…
  3. Vendor fix Red Hat Product Security RHSA-2025:8551 · 9 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. Vendor fix Red Hat Product Security RHSA-2025:8479 · 9 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  5. Vendor fix Red Hat Product Security RHSA-2025:8059 · 9 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
  6. Vendor fix Red Hat Product Security RHSA-2025:3930 · 48 productsIf you are using an earlier version of RHACS 4.7, you are advised to upgrade to this patch release 4.7.2.
  7. Vendor fix Red Hat Product Security RHSA-2025:3929 · 52 productsIf you are using an earlier version of RHACS 4.6, you are advised to upgrade to patch release 4.6.5.

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionpoc2024-10-21
  • CNACVSS 4.07.7known since 2026-10-23
  • CNACVSS 3.17.5known since 2026-10-23
  • NVDCVSS 3.17.5read 2026-10-23
  • CNAweakness (CWE)CWE-400known since 2026-10-23
  • FIRST EPSSEPSS score1.0 %2026-11-09
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryHIGH2024-10-22

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
2024-10-19
Last Modified
2026-08-01
NVD status
Modified
GitHub Advisory
GHSA-c7qv-q95q-8v27

Frequently asked questions

What is CVE-2024-21536?

Versions of the package http-proxy-middleware before 2.0.7, from 3.0.0 and before 3.0.3 are vulnerable to Denial of Service (DoS) due to an UnhandledPromiseRejection error thrown by micromatch. An attacker could kill the Node.js process and crash the server by making requests to certain paths.

Is CVE-2024-21536 actively exploited?

A proof-of-concept exploit exists for CVE-2024-21536, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2024-21536?

CVE-2024-21536 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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