{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-54428", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-06-14T09:39:30.814Z", "datePublished": "2026-07-01T17:03:53.938Z", "dateUpdated": "2026-07-01T18:15:56.634Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://repo.maven.apache.org/maven2/", "defaultStatus": "unaffected", "packageName": "org.apache.httpcomponents.core5:httpcore5-h2", "product": "Apache HttpComponents Core", "vendor": "Apache Software Foundation", "versions": [{"lessThanOrEqual": "5.5-beta1", "status": "affected", "version": "5.5-alpha", "versionType": "maven"}, {"lessThanOrEqual": "5.4.2", "status": "affected", "version": "5.0-alpha", "versionType": "maven"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Henry Huang <zhuang3@paypal.com>"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "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.<br><br>"}], "value": "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."}], "metrics": [{"other": {"content": {"text": "Important"}, "type": "Textual description of severity"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-400", "description": "CWE-400: Uncontrolled Resource Consumption", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-07-01T17:05:35.023Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://lists.apache.org/thread/5zjp8vczvxq19pw2rvhs21q446bhl0sd"}], "source": {"discovery": "UNKNOWN"}, "title": "Apache HttpComponents Core: HPackDecoder Unlimited Header List Size Before SETTINGS ACK", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/07/01/3"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-07-01T17:36:48.420Z"}}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-07-01T18:15:24.114171Z", "id": "CVE-2026-54428", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-01T18:15:56.634Z"}}]}}

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