CVE-2024-21536

HIGHNVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 1.0% (63rd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 1.0%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
The EG Score, 7.5 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.0%
EPSS %ILE
63rd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

October 19, 2024

Last Modified

August 2, 2026

Advisory Details (5)

Auto-updated Aug 1, 2026
Patch available. Sources: github_commit.
GitHub commit Patch Available

commit 0b4274e8cc9e (chimurai/http-proxy-middleware)

Patch available: chimurai/http-proxy-middleware v2.0.7-beta.1 (contains commit 0b4274e8cc9e)

https://github.com/chimurai/http-proxy-middleware/commit/0b4274e8cc9e9a2c5a06f35fbf456ccfcebc55a5
GitHub commit Patch Available

commit 788b21e4aff3 (chimurai/http-proxy-middleware)

Patch available: chimurai/http-proxy-middleware v3.0.3 (contains commit 788b21e4aff3)

https://github.com/chimurai/http-proxy-middleware/commit/788b21e4aff38332d6319557d4a5b1b13b1f9a22
Web page

`http-proxy-middleware` Denial-of-Service exploit for certain paths · GitHub

https://gist.github.com/mhassan1/28be67266d82a53708ed59ce5dc3c94a
Web page

Denial of Service (DoS) in org.webjars.npm:http-proxy-middleware | CVE-2024-21536 | Snyk

https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-8309098
Web page

Denial of Service (DoS) in http-proxy-middleware | CVE-2024-21536 | Snyk

https://security.snyk.io/vuln/SNYK-JS-HTTPPROXYMIDDLEWARE-8229906

Vendor Advisories for CVE-2024-21536(20)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(20)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatopenshift-pipelines/pipelines-hub-ui-rhel9:v1.19.0-17514238302025-07-14redhat
redhatopenshift-pipelines/pipelines-hub-ui-rhel8:v1.17.2-17500669362025-06-19redhat
redhatrhmtc/openshift-migration-ui-rhel8:v1.8.7-22025-06-04redhat
redhatodf4/odf-multicluster-console-rhel9:v4.16.10-32025-06-04redhat
redhatodf4/odf-multicluster-console-rhel9:v4.14.18-22025-06-04redhat
redhatopenshift-pipelines/pipelines-hub-ui-rhel8:v1.16.4-17479798462025-06-04redhat
redhatodf4/odf-multicluster-console-rhel9:v4.15.14-22025-06-04redhat
redhatopenshift-pipelines/pipelines-hub-ui-rhel9:v1.18.1-17476732972025-05-27redhat
redhatodf4/odf-multicluster-console-rhel9:v4.17.7-22025-05-21redhat
redhatodf4/odf-multicluster-console-rhel9:v4.18.2-82025-05-06redhat
redhatadvanced-cluster-security/rhacs-scanner-v4-rhel8:4.6.5-12025-04-15redhat
redhatadvanced-cluster-security/rhacs-scanner-v4-rhel8:4.7.2-32025-04-15redhat
redhatadvanced-cluster-security/rhacs-scanner-v4-rhel8:4.5.9-12025-04-15redhat
redhatdiscovery/discovery-ui-rhel9:1.12.0-12025-02-10redhat
redhatrhtpa/rhtpa-trustification-service-rhel9:1.2.1-17338269682024-12-17redhat
redhatrhdh/rhdh-hub-rhel9:1.4-17341064542024-12-17redhat
redhatrhtpa/rhtpa-guac-rhel9:1.2.1-17335751062024-12-17redhat
redhatrhosdt/jaeger-query-rhel8:rhosdt-3.42024-12-11redhat
redhatopenshift-service-mesh/proxyv2-rhel9:2.6.3-62024-11-14redhat
redhatrhdh/rhdh-hub-rhel9:1.3-1242024-11-11redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
http-proxy-middleware—
  • every version up to 2.0.7: fixed in 2.0.7
  • 3.0.0 up to 3.0.3: fixed in 3.0.3
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 28× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 94 of 194 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 6 repeat rows among the latest 100 are merged into the row they repeat. The 100 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-15 16:29 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  2. 2026-10-14 16:30 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  3. 2026-10-14 11:24 UTCOSV refresh
  4. 2026-10-13 16:30 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  5. 2026-10-12 18:03 UTCEG score recompute
  6. 2026-10-12 16:31 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  7. 2026-10-11 21:28 UTCEG score recompute
  8. 2026-10-11 16:21 UTCEG score recompute
  9. 2026-10-11 13:45 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  10. 2026-10-10 19:58 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  11. 2026-10-09 20:05 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  12. 2026-10-08 17:07 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  13. 2026-10-07 23:46 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  14. 2026-10-06 15:15 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  15. 2026-10-05 17:41 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  16. 2026-10-04 23:20 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  17. 2026-10-03 14:23 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  18. 2026-10-01 19:48 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  19. 2026-09-30 16:56 UTCEG score recompute
  20. 2026-09-30 15:01 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  21. 2026-09-29 15:17 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  22. 2026-09-28 13:49 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  23. 2026-09-24 14:01 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  24. 2026-09-23 14:34 UTCOSV refresh
  25. 2026-09-23 13:46 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
Show 69 more
  1. 2026-09-20 20:14 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  2. 2026-09-16 14:06 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  3. 2026-09-16 05:11 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  4. 2026-09-15 03:08 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  5. 2026-09-13 16:45 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  6. 2026-09-12 14:59 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  7. 2026-09-11 14:51 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  8. 2026-09-11 09:34 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  9. 2026-09-08 21:58 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  10. 2026-09-07 15:59 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  11. 2026-09-06 13:46 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  12. 2026-09-05 15:26 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  13. 2026-09-04 13:58 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  14. 2026-09-04 09:29 UTCOSV refresh
  15. 2026-09-04 05:05 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  16. 2026-09-02 14:10 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  17. 2026-09-01 13:52 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  18. 2026-08-30 19:15 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  19. 2026-08-30 01:20 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  20. 2026-08-28 21:39 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  21. 2026-08-27 14:23 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  22. 2026-08-26 14:44 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  23. 2026-08-25 13:47 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  24. 2026-08-23 00:17 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  25. 2026-08-21 23:47 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  26. 2026-08-20 22:53 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  27. 2026-08-19 17:02 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  28. 2026-08-18 13:46 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  29. 2026-08-17 20:00 UTCOSV refresh
  30. 2026-08-17 13:45 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  31. 2026-08-16 14:54 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  32. 2026-08-16 02:12 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  33. 2026-08-15 01:28 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  34. 2026-08-13 21:58 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  35. 2026-08-12 13:49 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  36. 2026-08-11 13:40 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  37. 2026-08-09 13:45 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  38. 2026-08-08 16:35 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  39. 2026-08-06 13:45 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  40. 2026-08-05 19:15 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  41. 2026-08-04 15:08 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  42. 2026-08-04 10:36 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  43. 2026-08-03 10:34 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  44. 2026-08-02 15:38 UTCEG score recompute
  45. 2026-08-02 15:38 UTCVendor advisory
  46. 2026-08-02 15:38 UTCMITRE cvelistV5CVSS v4 → 8.7
  47. 2026-08-02 02:25 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  48. 2026-08-01 16:26 UTCVendor advisory
  49. 2026-08-01 16:25 UTCNVD updateCVSS v4 → 7.7
  50. 2026-08-01 15:38 UTCEG score recompute
  51. 2026-08-01 15:38 UTCVendor advisory
  52. 2026-08-01 15:37 UTCMITRE cvelistV5CVSS v4 → 8.7
  53. 2026-08-01 04:14 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  54. 2026-07-31 15:42 UTCOSV refresh
  55. 2026-07-30 16:26 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  56. 2026-07-30 01:29 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  57. 2026-07-28 15:34 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  58. 2026-07-27 14:11 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  59. 2026-07-26 14:53 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  60. 2026-07-25 14:16 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  61. 2026-07-24 14:16 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  62. 2026-07-23 14:17 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  63. 2026-07-23 02:33 UTCEG score recompute
  64. 2026-07-22 23:20 UTCEG score recompute
  65. 2026-07-22 14:07 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  66. 2026-07-21 15:23 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  67. 2026-07-20 17:06 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  68. 2026-07-19 14:30 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  69. 2026-07-19 02:28 UTCEPSS rescoreEPSS 1.0% · 59th percentile

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2024-21536?
CVE-2024-21536 is a high-severity vulnerability; its CVE record was published on October 19, 2024. 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.
When was the CVE record for CVE-2024-21536 published?
The CVE record for CVE-2024-21536 was published on October 19, 2024. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 2, 2026; the record at its source may have been updated since.
Is CVE-2024-21536 actively exploited?
CVE-2024-21536 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.0% probability of exploitation in the next 30 days (63rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2024-21536?
CVE-2024-21536 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2024-21536?
A fix for CVE-2024-21536 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2024-21536 are linked in the Vendor Advisories panel on this page.

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