CVE-2026-14180

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-08-11. A secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1.0%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in the ChunkReader component of the Undertow HTTP server, which is used by WildFly and JBoss EAP to handle chunked transfer encoding. The issue occurs because the parser uses a single internal variable to store both the remaining chunk size and state flags. By sending a specially crafted request with an extremely large chunk size, an attacker can cause these values to overlap, tricking the parser into thinking a request has finished prematurely. This can allow a second, "smuggled" request to be processed out of sync, potentially bypassing security controls.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100CISA SSVC

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
Severity53% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
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
62nd
KEV
Not listed

CISA SSVCTrack 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 none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 11, 2026

Last Modified

September 22, 2026

Advisory Details (2)

Auto-updated Aug 11, 2026
Patch available. Sources: redhat.
redhat

2494771 – (CVE-2026-14180) CVE-2026-14180 undertow-core: Undertow:HTTP request smuggling via oversized chunk-size bit overlap

https://bugzilla.redhat.com/show_bug.cgi?id=2494771
redhat Patch Available

CVE-2026-14180 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-14180

Vendor Advisories for CVE-2026-14180(4)

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

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhateap8-xml-security-0:3.0.6-1.redhat_00001.1.el8eap2026-09-22redhat
redhateap8-xml-security-0:3.0.6-1.redhat_00001.1.el9eap2026-09-22redhat
redhateap8-xml-security-0:3.0.6-1.redhat_00001.1.el10eap2026-09-22redhat

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)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
undertow1.3.11-1 ... 2.3.8-2 (56 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 82× 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 156 total refreshes for this CVE.

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

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

Frequently asked(5)

What is CVE-2026-14180?
CVE-2026-14180 is a medium vulnerability published on August 11, 2026. A flaw was found in the ChunkReader component of the Undertow HTTP server, which is used by WildFly and JBoss EAP to handle chunked transfer encoding. The issue occurs because the parser uses a single internal variable to store both the remaining chunk size and state flags. By sending a specially…
When was CVE-2026-14180 disclosed?
CVE-2026-14180 was first published on August 11, 2026, with the most recent update on September 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-14180 actively exploited?
CVE-2026-14180 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.0% probability of exploitation in the next 30 days (62nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-14180?
CVE-2026-14180 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-14180?
A fix for CVE-2026-14180 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-14180 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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