{"schema":"threatline.record/2","record":{"id":"CVE-2026-102466","aliases":["GHSA-9jxp-x3fr-ffqh"],"summary":"In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the Vert.x MySQL client (vertx-mysql-client) pre-allocates an array for column definitions based on a s","details":"In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the Vert.x MySQL client (vertx-mysql-client) pre-allocates an array for column definitions based on a server-declared column count with no upper-bound validation. A malicious or compromised MySQL server, or an attacker with man-in-the-middle positioning, can send a crafted result set packet with an extremely large column count, causing the client to attempt a massive heap allocation. The resulting OutOfMemoryError crashes the Netty event loop thread, causing a complete denial of service for all connections and verticles in the Vert.x application.\n\n\n\nThe impacted component is io.vertx:vertx-mysql-client.","categories":["Unclassified"],"product":"Eclipse Vert.x","vendor":"Eclipse Foundation","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-102466","source_modified_at":"2026-10-15T14:24:55.316Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"Eclipse Vert.x","vendor":"Eclipse Foundation","versions":[{"status":"affected","version":"4.0.0","lessThanOrEqual":"4.5.34","versionType":"semver"},{"status":"affected","version":"5.0.0","lessThanOrEqual":"5.0.12","versionType":"semver"},{"status":"affected","version":"5.1.0","lessThanOrEqual":"5.1.9","versionType":"semver"},{"status":"affected","version":"5.2.0","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":8.2,"severity":"High","kev":{"listed":false},"epss":{"probability":0.0028,"percentile":0.19442,"score_date":"2026-10-23"},"published_at":"2026-10-15T08:15:32.883Z","modified_at":"2026-10-15T14:24:55.316Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-102466","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-15T14:24:55.316Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-102466","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/eclipse-vertx/vertx-sql-client/security/advisories/GHSA-9jxp-x3fr-ffqh"},{"source":"CVE List","url":"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/342"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-15T14:23:56.020086Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-15T14:24:55.316Z","content_hash":"d42f074dbcd2708269eaf1231cf2ea445f6bf1ee1298dd8f9b33989752b1ea45"}}