{"schemaVersion":3,"id":"CVE-2026-107937","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"In Apache CXF, the parser for multipart/MTOM attachment part headers did not fully enforce the configured attachment-max-header-size (default 300 characters) and attachment-headers-max-count (default 500) limits. The size limit was applied only to each physical line, not to a header value built from continuation lines or to the combined values of a repeated header. The count limit was checked against the number of distinct header names, not the total number of header lines. A remote, unauthenticated attacker could send a multipart request with very large folded or repeated part headers. The server would then allocate memory without bound, causing a denial of service.\nUsers are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this 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of Resources Without Limits or Throttling","description":"The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/770.html"}],"affected":[{"vendor":"apache software foundation","product":"apache cxf","name":"Apache CXF","label":"apache cxf","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 4.2.0, < 4.2.4","noFixRecorded":false,"fixedIn":null},{"text":"≥ 4.0.0, < 4.1.9","noFixRecorded":false,"fixedIn":null},{"text":"< 3.6.13","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 4.2.0, < 4.2.4 | ≥ 4.0.0, < 4.1.9 | < 3.6.13","eol":null,"hubHref":"/vendor/apache_software_foundation/apache_cxf"},{"vendor":"apache","product":"cxf","name":"cxf","label":"cxf","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 3.6.13","noFixRecorded":false,"fixedIn":null},{"text":"≥ 4.0.0, < 4.1.9","noFixRecorded":false,"fixedIn":null},{"text":"≥ 4.2.0, < 4.2.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.6.13 | ≥ 4.0.0, < 4.1.9 | ≥ 4.2.0, < 4.2.4","eol":null,"hubHref":"/vendor/apache/cxf"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://lists.apache.org/thread.html/x9twtpv3d04qj83t6w9xkh9y2q28zztj","label":"lists.apache.org/thread.html/x9twtpv3d04qj83t6w9xkh9y2q28zztj","hostname":"lists.apache.org","tags":["Vendor Advisory","Issue Tracking","Mailing List"]},{"url":"http://www.openwall.com/lists/oss-security/2026/10/09/12","label":"www.openwall.com/lists/oss-security/2026/10/09/12","hostname":"www.openwall.com","tags":["Mailing List","Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-09T10:19:53.377Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-15T17:45:25.955Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T09:36:05.994Z","stale":false,"partial":false}}