CVE-2024-4027

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 72% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A flaw was found in Undertow. Servlets using a method that calls HttpServletRequestImpl.getParameterNames() can cause an OutOfMemoryError when the client sends a request with large parameter names. This issue can be exploited by an unauthorized user to cause a remote denial-of-service (DoS) attack.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

January 30, 2026

Last Modified

September 1, 2026

Advisory Details (3)

Auto-updated Jul 1, 2026
Patch available. Sources: redhat.
redhat
https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-4027.json
redhat

Bug Access Denied

https://bugzilla.redhat.com/show_bug.cgi?id=2276410
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2024-4027

Affected Packages

(2 across 2 ecosystems)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
undertow1.3.11-1 ... 2.3.8-2 (56 versions)——
Maven(1)
PackageVulnerable rangeFixed inDependents
io.undertow:undertow-core2.3.0.Alpha1 ... 2.3.9.Final (24 versions)2.3.21.Final—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 35× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 190 total refreshes for this CVE.

  1. 2026-09-18 19:26 UTCEPSS rescore
  2. 2026-09-17 19:27 UTCEPSS rescore
  3. 2026-09-16 14:06 UTCEPSS rescore
  4. 2026-09-16 05:12 UTCEPSS rescore
  5. 2026-09-15 03:08 UTCEPSS rescore
  6. 2026-09-15 03:08 UTCEPSS rescore
  7. 2026-09-13 16:45 UTCEPSS rescore
  8. 2026-09-12 14:59 UTCEPSS rescore
  9. 2026-09-11 14:51 UTCEPSS rescore
  10. 2026-09-11 09:35 UTCEPSS rescore
  11. 2026-09-10 09:33 UTCEPSS rescore
  12. 2026-09-08 21:58 UTCEPSS rescore
  13. 2026-09-07 16:00 UTCEPSS rescore
  14. 2026-09-06 13:46 UTCEPSS rescore
  15. 2026-09-06 13:46 UTCEPSS rescore
  16. 2026-09-04 13:59 UTCEPSS rescore
  17. 2026-09-04 05:05 UTCEPSS rescore
  18. 2026-09-02 14:10 UTCEPSS rescore
  19. 2026-09-01 13:53 UTCEG score recompute
  20. 2026-09-01 13:52 UTCEPSS rescore
  21. 2026-09-01 13:52 UTCEPSS rescore
  22. 2026-09-01 12:24 UTCEG score recompute
  23. 2026-09-01 04:37 UTCEPSS rescore
  24. 2026-08-31 14:31 UTCEG score recompute
  25. 2026-08-31 14:07 UTCEG score recompute
Show 75 more
  1. 2026-08-30 19:16 UTCEPSS rescore
  2. 2026-08-30 01:20 UTCEPSS rescore
  3. 2026-08-28 21:39 UTCEPSS rescore
  4. 2026-08-27 14:23 UTCEPSS rescore
  5. 2026-08-26 14:44 UTCEPSS rescore
  6. 2026-08-25 13:47 UTCEPSS rescore
  7. 2026-08-24 14:15 UTCEPSS rescore
  8. 2026-08-23 00:18 UTCEPSS rescore
  9. 2026-08-21 23:47 UTCEPSS rescore
  10. 2026-08-20 22:54 UTCEPSS rescore
  11. 2026-08-19 17:02 UTCEPSS rescore
  12. 2026-08-19 17:02 UTCEPSS rescore
  13. 2026-08-18 13:46 UTCEPSS rescore
  14. 2026-08-17 13:45 UTCEPSS rescore
  15. 2026-08-16 14:54 UTCEPSS rescore
  16. 2026-08-16 02:13 UTCEPSS rescore
  17. 2026-08-15 01:29 UTCEPSS rescore
  18. 2026-08-14 11:52 UTCEG score recompute
  19. 2026-08-13 21:59 UTCEPSS rescore
  20. 2026-08-13 03:59 UTCEG score recompute
  21. 2026-08-12 13:49 UTCEPSS rescore
  22. 2026-08-11 13:40 UTCEPSS rescore
  23. 2026-08-10 23:58 UTCEPSS rescore
  24. 2026-08-09 16:23 UTCEG score recompute
  25. 2026-08-09 13:45 UTCEPSS rescore
  26. 2026-08-08 16:35 UTCEPSS rescore
  27. 2026-08-07 23:09 UTCEG score recompute
  28. 2026-08-07 16:25 UTCEPSS rescore
  29. 2026-08-06 13:45 UTCEPSS rescore
  30. 2026-08-06 04:40 UTCEG score recompute
  31. 2026-08-05 19:16 UTCEPSS rescore
  32. 2026-08-05 13:54 UTCEG score recompute
  33. 2026-08-05 12:45 UTCEG score recompute
  34. 2026-08-04 18:26 UTCEG score recompute
  35. 2026-08-04 18:01 UTCEG score recompute
  36. 2026-08-04 15:08 UTCEPSS rescore
  37. 2026-08-04 10:36 UTCEPSS rescore
  38. 2026-08-03 10:34 UTCEPSS rescore
  39. 2026-08-02 21:50 UTCEG score recompute
  40. 2026-08-02 02:25 UTCEPSS rescore
  41. 2026-08-01 04:14 UTCEPSS rescore
  42. 2026-08-01 04:14 UTCEPSS rescore
  43. 2026-07-30 16:26 UTCEPSS rescore
  44. 2026-07-30 01:29 UTCEPSS rescore
  45. 2026-07-28 15:35 UTCEPSS rescore
  46. 2026-07-27 14:11 UTCEPSS rescore
  47. 2026-07-26 14:53 UTCEPSS rescore
  48. 2026-07-26 14:53 UTCEPSS rescore
  49. 2026-07-25 14:17 UTCEPSS rescore
  50. 2026-07-25 14:16 UTCEPSS rescore
  51. 2026-07-24 14:16 UTCEPSS rescore
  52. 2026-07-23 14:17 UTCEPSS rescore
  53. 2026-07-23 14:17 UTCEPSS rescore
  54. 2026-07-23 02:39 UTCEG score recompute
  55. 2026-07-22 14:07 UTCEPSS rescore
  56. 2026-07-22 14:07 UTCEPSS rescore
  57. 2026-07-21 15:23 UTCEPSS rescore
  58. 2026-07-20 17:06 UTCEPSS rescore
  59. 2026-07-19 14:30 UTCEPSS rescore
  60. 2026-07-19 14:30 UTCEPSS rescore
  61. 2026-07-19 02:28 UTCEPSS rescore
  62. 2026-07-19 02:28 UTCEPSS rescore
  63. 2026-07-18 10:03 UTCEPSS rescore
  64. 2026-07-18 10:03 UTCEPSS rescore
  65. 2026-07-16 17:02 UTCEPSS rescore
  66. 2026-07-15 16:57 UTCEPSS rescore
  67. 2026-07-15 16:56 UTCEPSS rescore
  68. 2026-07-15 01:59 UTCEPSS rescore
  69. 2026-07-15 01:59 UTCEPSS rescore
  70. 2026-07-13 22:29 UTCEPSS rescore
  71. 2026-07-13 06:12 UTCEPSS rescore
  72. 2026-07-12 05:45 UTCEPSS rescore
  73. 2026-07-12 05:45 UTCEPSS rescore
  74. 2026-07-11 08:26 UTCEPSS rescore
  75. 2026-07-09 19:09 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2024-4027?
CVE-2024-4027 is a high vulnerability published on January 30, 2026. A flaw was found in Undertow. Servlets using a method that calls HttpServletRequestImpl.getParameterNames() can cause an OutOfMemoryError when the client sends a request with large parameter names. This issue can be exploited by an unauthorized user to cause a remote denial-of-service (DoS) attack.
When was CVE-2024-4027 disclosed?
CVE-2024-4027 was first published in the National Vulnerability Database on January 30, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-4027 actively exploited?
CVE-2024-4027 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 70.7% of all scored CVEs.
What is the CVSS score of CVE-2024-4027?
CVE-2024-4027 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2024-4027?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-4027, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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