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CVE-2026-54428

7.5 high SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 2

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 7.5 · apacheNVD modified 2026-10-25 17:10

Affected (CPE criteria) 3

  • cpe:2.3:a:apache:httpcomponents_core:*:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:httpcomponents_core:5.5:alpha1:*:*:*:*:*:*
  • cpe:2.3:a:apache:httpcomponents_core:5.5:beta1:*:*:*:*:*:*

References 2