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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.9%CVSS: 7.5Exploit: None knownExposed services: Not assessed

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
7.5HIGHmedium confidence
EG Risk
39
EG Risk 39/100

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
Severity75% × 45%
Exploitation1% × 40%
Automatability30% × 15%
EPSS PROB
0.9%
EPSS %ILE
57th
KEV
Not listed

Published

July 1, 2026

Last Modified

July 24, 2026

Advisory Details (2)

Auto-updated Jul 1, 2026
Patch available.
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 / EcosystemFix (by version range) / 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 rangeFix by version rangeDependents
httpcomponents-core4.4.16-1
  • every version on: no fix on record
—
httpcomponents-core55.2.2-1 ... 5.4.4-1 (8 versions)
  • every version on: no fix on record
—
Debian:14(2)
PackageVulnerable rangeFix by version rangeDependents
httpcomponents-core4.4.16-1
  • every version on: no fix on record
—
httpcomponents-core55.2.2-1 ... 5.4.2-2 (6 versions)
  • every version up to 5.4.3-1: fixed in 5.4.3-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
httpcomponents-core55.2.1-1 ... 5.4.4-1 (9 versions)
  • every version on: no fix on record
—
Maven(1)
PackageVulnerable rangeFix by version rangeDependents
org.apache.httpcomponents.core5:httpcore5-h25.5-alpha1, 5.5-beta1
  • every version up to 5.4.3: fixed in 5.4.3
  • 5.5-alpha1 up to 5.5-beta2: fixed in 5.5-beta2
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 34× 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 263 total refreshes for this CVE.

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

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

Same product

2 shown

Debian:12:httpcomponents-core5 · Debian:14:httpcomponents-core5

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 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 0.9% probability of exploitation in the next 30 days (57th percentile of EPSS-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?
A fix for CVE-2026-54428 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-54428 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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