{"id":"GHSA-797x-p4mc-jwpm","summary":"MariaDB Connector/J: Length-encoded integers larger than Integer.MAX_VALUE were truncated before being used as lengths","details":"## Summary\n\nMariaDB Connector/J narrowed 8-byte length-encoded integers received from the\nserver to `int` without validation. A rogue or MitM server can send a value above\n`Integer.MAX_VALUE` whose truncation becomes a negative or arbitrary length.\n\n## Details\n\nThe protocol encodes lengths as length-encoded integers, whose 8-byte form the\ndecoder (`readLength()` and `readIntLengthEncodedNotNull()`) returned as\n`(int) readLong()`. A value above `Integer.MAX_VALUE` therefore wrapped to a\nnegative or unrelated `int`, used afterwards as a length to size allocations or\nreads, which ended in `NegativeArraySizeException`, out-of-bounds exceptions or\noversized allocations.\n\nThe fix rejects any length-encoded value that does not fit a non-negative `int`\nwith an explicit error.\n\n## Impact\n\nAvailability only: a malicious or compromised server, or a MitM, can crash the\nclient's connection handling with unchecked exceptions or drive oversized\nallocations. Exploitation requires control of the server side of the connection;\nno authentication bypass, confidentiality or integrity impact.\n\n## Credit\n\nReported by fg0x0","aliases":["CVE-2026-119279"],"modified":"2026-10-30T23:15:05.687493406Z","published":"2026-10-30T23:00:07Z","database_specific":{"github_reviewed_at":"2026-10-30T23:00:07Z","nvd_published_at":"2026-10-29T21:17:21Z","cwe_ids":["CWE-130","CWE-190"],"severity":"MODERATE","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/mariadb-corporation/mariadb-connector-j/security/advisories/GHSA-797x-p4mc-jwpm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119279"},{"type":"WEB","url":"https://github.com/mariadb-corporation/mariadb-connector-j/commit/30d4a883377a9b7762e02ee2c60d54567032ab99"},{"type":"WEB","url":"https://github.com/mariadb-corporation/mariadb-connector-j/commit/bfd9f5ad666a6f7f5401a5b78f2ac2fbd6df8667"},{"type":"WEB","url":"https://github.com/mariadb-corporation/mariadb-connector-j/commit/dbbadc3e215c47bdb913ddf50739ada09a7f23ea"},{"type":"PACKAGE","url":"https://github.com/mariadb-corporation/mariadb-connector-j"},{"type":"WEB","url":"https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.3.7"},{"type":"WEB","url":"https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.4.5"},{"type":"WEB","url":"https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.5.10"}],"affected":[{"package":{"name":"org.mariadb.jdbc:mariadb-java-client","ecosystem":"Maven","purl":"pkg:maven/org.mariadb.jdbc/mariadb-java-client"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.3.7"}]}],"versions":["3.0.1-beta","3.0.10","3.0.11","3.0.2-rc","3.0.3","3.0.4","3.0.5","3.0.6","3.0.7","3.0.8","3.0.9","3.1.0","3.1.1","3.1.2","3.1.3","3.1.4","3.2.0","3.3.0","3.3.1","3.3.2","3.3.3","3.3.4","3.3.5","3.3.6"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-797x-p4mc-jwpm/GHSA-797x-p4mc-jwpm.json"}},{"package":{"name":"org.mariadb.jdbc:mariadb-java-client","ecosystem":"Maven","purl":"pkg:maven/org.mariadb.jdbc/mariadb-java-client"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4.0"},{"fixed":"3.4.5"}]}],"versions":["3.4.0","3.4.1","3.4.2","3.4.3","3.4.4"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-797x-p4mc-jwpm/GHSA-797x-p4mc-jwpm.json"}},{"package":{"name":"org.mariadb.jdbc:mariadb-java-client","ecosystem":"Maven","purl":"pkg:maven/org.mariadb.jdbc/mariadb-java-client"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.5.0"},{"fixed":"3.5.10"}]}],"versions":["3.5.0","3.5.1","3.5.2","3.5.3","3.5.4","3.5.5","3.5.6","3.5.7","3.5.8","3.5.9"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-797x-p4mc-jwpm/GHSA-797x-p4mc-jwpm.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}