{"id":"CVE-2026-54428","state":"PUBLISHED","title":"Apache HttpComponents Core: HPackDecoder Unlimited Header List Size Before SETTINGS ACK","description":"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.","publishedAt":"2026-07-01T17:03:53.938Z","updatedAt":"2026-07-01T18:15:56.634Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"apache","products":["Apache Software Foundation Apache HttpComponents Core"],"affected":[{"vendor":"Apache Software Foundation","product":"Apache HttpComponents Core","packageName":"org.apache.httpcomponents.core5:httpcore5-h2","defaultStatus":"unaffected","versions":[{"version":"5.5-alpha","status":"affected","lessThanOrEqual":"5.5-beta1","versionType":"maven"},{"version":"5.0-alpha","status":"affected","lessThanOrEqual":"5.4.2","versionType":"maven"}],"collectionURL":"https://repo.maven.apache.org/maven2/"}],"references":["https://lists.apache.org/thread/5zjp8vczvxq19pw2rvhs21q446bhl0sd","http://www.openwall.com/lists/oss-security/2026/07/01/3"],"weaknesses":["CWE-770","CWE-400"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/54xxx/CVE-2026-54428.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54428","state":"PUBLISHED","datePublished":"2026-07-01T17:03:53.938Z","dateUpdated":"2026-07-01T18:15:56.634Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2026-06-14T09:39:30.814Z"},"containers":{"cna":{"title":"Apache HttpComponents Core: HPackDecoder Unlimited Header List Size Before SETTINGS ACK","descriptions":[{"lang":"en","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."}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache HttpComponents Core","packageName":"org.apache.httpcomponents.core5:httpcore5-h2","defaultStatus":"unaffected","versions":[{"version":"5.5-alpha","status":"affected","lessThanOrEqual":"5.5-beta1","versionType":"maven"},{"version":"5.0-alpha","status":"affected","lessThanOrEqual":"5.4.2","versionType":"maven"}],"collectionURL":"https://repo.maven.apache.org/maven2/"}],"references":[{"url":"https://lists.apache.org/thread/5zjp8vczvxq19pw2rvhs21q446bhl0sd","tags":["vendor-advisory"]}],"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":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2026-07-01T17:05:35.023Z"},"credits":[{"lang":"en","type":"finder","value":"Henry Huang <zhuang3@paypal.com>"}],"source":{"discovery":"UNKNOWN"},"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":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-07-01T17:36:48.420Z"}},{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-01T18:15:56.634Z"}}]}}}