{"cvss":7.5,"datePublished":"2026-07-01T18:16:34.507","dateUpdated":"2026-10-25T17:10:00.197","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.","id":"CVE-2026-54428","raw":{"affected":[{"affectedData":[{"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"}]}],"source":"security@apache.org"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:apache:httpcomponents_core:*:*:*:*:*:*:*:*","matchCriteriaId":"A8EEC5B5-1DF7-46C6-BDF1-682D12E33F04","versionEndIncluding":"5.4.2","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:a:apache:httpcomponents_core:5.5:alpha1:*:*:*:*:*:*","matchCriteriaId":"3A6F1338-5376-4581-AF9B-202B62133A9F","vulnerable":true},{"criteria":"cpe:2.3:a:apache:httpcomponents_core:5.5:beta1:*:*:*:*:*:*","matchCriteriaId":"860D474E-62CA-463F-AD9A-B7C44C148CD2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"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."},{"lang":"es","value":"Asignación de recursos sin límites ni estrangulamiento en el decodificador HPACK de HTTP/2 en Apache HttpComponents Core (5.4.2 y anteriores, 5.5-beta1 y anteriores) permite a un atacante remoto causar una denegación de servicio mediante el agotamiento de la memoria enviando bloques de cabecera comprimidos de tamaño excesivo antes de que el reconocimiento de SETTINGS de HTTP/2 provoque que se aplique el límite de tamaño de la lista de cabeceras configurado."}],"id":"CVE-2026-54428","lastModified":"2026-10-25T17:10:00.197","metrics":{"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"exploitabilityScore":3.9,"impactScore":3.6,"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary"}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"id":"CVE-2026-54428","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-07-01T18:15:24.114171Z","version":"2.0.3"}}]},"published":"2026-07-01T18:16:34.507","references":[{"source":"security@apache.org","tags":["Mitigation","Vendor Advisory"],"url":"https://lists.apache.org/thread/5zjp8vczvxq19pw2rvhs21q446bhl0sd"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mitigation","Third Party Advisory"],"url":"http://www.openwall.com/lists/oss-security/2026/07/01/3"}],"sourceIdentifier":"security@apache.org","vulnStatus":"Analyzed","weaknesses":[{"description":[{"lang":"en","value":"CWE-400"},{"lang":"en","value":"CWE-770"}],"source":"security@apache.org","type":"Secondary"}]},"severity":"HIGH","source":"nvd","title":"Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5.4.2..."}