{"id":"CVE-2026-107937","revision":"62e429d672494f14ac94216bf490c93d","records":[{"revision":"62e429d672494f14ac94216bf490c93d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-107937","aliases":[],"title":"Apache CXF: The attachment header size and count limits can be bypassed, which allows denial of service through memory exhaustion.","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.\u00A0\nUsers are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.","state":0,"publishedAt":"2026-10-09T10:19:53.377+00:00","modifiedAt":"2026-10-15T17:45:25.955+00:00","affected":[{"ecosystem":"https://repo.maven.apache.org/maven2","name":"org.apache.cxf:cxf-core","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Apache Software Foundation\",\n                    \"product\": \"Apache CXF\",\n                    \"packageURL\": \"pkg:maven/org.apache.cxf/cxf-core\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"4.2.0\",\n                            \"lessThan\": \"4.2.4\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"4.0.0\",\n                            \"lessThan\": \"4.1.9\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.6.13\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"collectionURL\": \"https://repo.maven.apache.org/maven2\",\n                    \"packageName\": \"org.apache.cxf:cxf-core\"\n                }"}],"metrics":[],"references":["https://lists.apache.org/thread.html/x9twtpv3d04qj83t6w9xkh9y2q28zztj"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-107937","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-107937","identifiers":["CVE-2026-107937"]},"retained":false,"historicalAffected":[]}],"coverage":[]}