CVE-2026-54428

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-01. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — Patch released this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an remote attacker to cause a denial of service through memory exhaustion by sending oversized compressed header blocks before the HTTP/2 SETTINGS acknowledgement causes the configured header list size limit to be applied.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
57%
KEV
Not listed

Published

July 1, 2026

Last Modified

July 24, 2026

Advisory Details (2)

Auto-updated Jul 1, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-54428: Apache HttpComponents Core: HPackDecoder Unlimited Header List Size Before SETTINGS ACK

http://www.openwall.com/lists/oss-security/2026/07/01/3
generic
https://lists.apache.org/thread/5zjp8vczvxq19pw2rvhs21q446bhl0sd

Vendor Advisories for CVE-2026-54428(17)

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

Patch Availability(15)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatcryostat/cryostat-rhel9:4.2.0-142026-09-16redhat
redhatdevspaces/pluginregistry-rhel9:17877597232026-09-01redhat
redhatocp-tools-4/jenkins-rhel9:17871250692026-08-26redhat
redhatocp-tools-4/jenkins-rhel8:17866286812026-08-26redhat
redhatocp-tools-4/jenkins-rhel8:17865335612026-08-26redhat
redhatocp-tools-4/jenkins-rhel8:17865335652026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871246322026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871251662026-08-26redhat
redhatocp-tools-4/jenkins-rhel8:17866286672026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871253112026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871247792026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871249252026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871246352026-08-26redhat
redhathttpcore5-h22026-08-13redhat
redhatpatch2026-07-30redhat

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

(6 across 4 ecosystems)
Debian:13(2)
PackageVulnerable rangeFixed inDependents
httpcomponents-core4.4.16-1——
httpcomponents-core55.2.2-1 ... 5.4.3-1 (7 versions)——
Debian:14(2)
PackageVulnerable rangeFixed inDependents
httpcomponents-core4.4.16-1——
httpcomponents-core55.2.2-1 ... 5.4.2-2 (6 versions)5.4.3-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
httpcomponents-core55.2.1-1 ... 5.4.3-1 (8 versions)——
Maven(1)
PackageVulnerable rangeFixed inDependents
org.apache.httpcomponents.core5:httpcore5-h25.5-alpha1, 5.5-beta15.5-beta2—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 57× 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 243 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-54428?
CVE-2026-54428 is a high vulnerability published on July 1, 2026. Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an remote attacker to cause a denial of service through memory exhaustion by sending oversized compressed header blocks before the HTTP/2…
When was CVE-2026-54428 disclosed?
CVE-2026-54428 was first published in the National Vulnerability Database on July 1, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54428 actively exploited?
CVE-2026-54428 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 42.8% of all scored CVEs.
What is the CVSS score of CVE-2026-54428?
CVE-2026-54428 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-54428?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54428, 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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