GHSA-V3JC-474W-2WM6

Vulnerability from github – Published: 2026-07-01 18:31 – Updated: 2026-08-13 18:27
VLAI
Summary
Apache HttpComponents Core: HPackDecoder Unlimited Header List Size Before SETTINGS ACK
Details

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.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.httpcomponents.core5:httpcore5-h2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.4.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.httpcomponents.core5:httpcore5-h2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.5-alpha1"
            },
            {
              "fixed": "5.5-beta2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54428"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-13T18:27:16Z",
    "nvd_published_at": "2026-07-01T18:16:34Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-v3jc-474w-2wm6",
  "modified": "2026-08-13T18:27:16Z",
  "published": "2026-07-01T18:31:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54428"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/httpcomponents-core/commit/1ea1239bbbe3442a8382a87279c0a8119a7e358e"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/httpcomponents-core/commit/cc30ee058a7b10cbf4ad3dd6270ab6d1f6a74c49"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/apache/httpcomponents-core"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/5zjp8vczvxq19pw2rvhs21q446bhl0sd"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/07/01/3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Apache HttpComponents Core: HPackDecoder Unlimited Header List Size Before SETTINGS ACK"
}



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