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