{"id":"CVE-2026-104712","state":"PUBLISHED","title":"Apache Struts: Disproportionate response size when rendering BigDecimal request parameters","description":"Asymmetric resource consumption (amplification) vulnerability in Apache Struts. When a request parameter is bound to an arbitrary-precision decimal (java.math.BigDecimal) property that is then rendered through the Struts tag library, the framework can produce a response many orders of magnitude larger than the request, allowing an unauthenticated remote attacker to exhaust server CPU and outbound network capacity with sustained low-volume traffic. Applications that do not bind request parameters to BigDecimal properties, or never render such a property through the Struts tag library, are not affected.\n\nThis issue affects Apache Struts: from 2.5.14 through 2.5.33, from 6.0.0 through 6.11.0, from 7.0.0 through 7.3.0.\n\nUsers are recommended to upgrade to version 6.12.0 or 7.4.0, which fixes the issue.","publishedAt":"2026-10-05T18:35:41.767Z","updatedAt":"2026-10-06T14:10:31.329Z","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 Struts"],"affected":[{"vendor":"Apache Software Foundation","product":"Apache Struts","packageName":"org.apache.struts:struts2-core","packageURL":"pkg:maven/org.apache.struts/struts2-core","defaultStatus":"unaffected","versions":[{"version":"2.5.14","status":"affected","lessThanOrEqual":"2.5.33","versionType":"semver"},{"version":"6.0.0","status":"affected","lessThanOrEqual":"6.11.0","versionType":"semver"},{"version":"7.0.0","status":"affected","lessThanOrEqual":"7.3.0","versionType":"semver"}],"collectionURL":"https://repo.maven.apache.org/maven2"}],"references":["https://cwiki.apache.org/confluence/display/WW/S2-076","http://www.openwall.com/lists/oss-security/2026/10/05/11"],"weaknesses":["CWE-405"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/104xxx/CVE-2026-104712.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-104712","state":"PUBLISHED","datePublished":"2026-10-05T18:35:41.767Z","dateUpdated":"2026-10-06T14:10:31.329Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2026-10-02T10:54:11.636Z"},"containers":{"cna":{"title":"Apache Struts: Disproportionate response size when rendering BigDecimal request parameters","descriptions":[{"lang":"en","value":"Asymmetric resource consumption (amplification) vulnerability in Apache Struts. 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Applications that do not bind request parameters to BigDecimal properties, or never render such a property through the Struts tag library, are not affected.\n\nThis issue affects Apache Struts: from 2.5.14 through 2.5.33, from 6.0.0 through 6.11.0, from 7.0.0 through 7.3.0.\n\nUsers are recommended to upgrade to version 6.12.0 or 7.4.0, which fixes the issue."}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache Struts","packageName":"org.apache.struts:struts2-core","packageURL":"pkg:maven/org.apache.struts/struts2-core","defaultStatus":"unaffected","versions":[{"version":"2.5.14","status":"affected","lessThanOrEqual":"2.5.33","versionType":"semver"},{"version":"6.0.0","status":"affected","lessThanOrEqual":"6.11.0","versionType":"semver"},{"version":"7.0.0","status":"affected","lessThanOrEqual":"7.3.0","versionType":"semver"}],"collectionURL":"https://repo.maven.apache.org/maven2"}],"references":[{"url":"https://cwiki.apache.org/confluence/display/WW/S2-076","tags":["vendor-advisory"]}],"metrics":[{"other":{"type":"Textual description of severity","content":{"text":"moderate"}},"scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-405","description":"CWE-405 Asymmetric Resource Consumption (Amplification)","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2026-10-05T18:35:41.767Z"},"source":{"discovery":"EXTERNAL"},"credits":[{"lang":"en","value":"0xCc.zhang","type":"finder"}],"x_generator":{"engine":"Vulnogram 1.0.3"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/10/05/11"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-10-05T19:08:41.655Z"}},{"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":"2026-10-06T14:09:49.658503Z","id":"CVE-2026-104712","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":"2026-10-06T14:10:31.329Z"}}]}}}