{"schemaVersion":3,"id":"CVE-2026-102463","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"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 binary array decoder in vertx-pg-client (DataTypeCodec.binaryDecodeArray) allocates a Java array sized by a server-declared 32-bit dimension count with no upper bound. A malicious or compromised PostgreSQL server, or an on-path attacker intercepting an unencrypted connection, can send a crafted DataRow message with an excessively large array dimension value, causing the client to attempt a multi-gigabyte heap allocation and crash with an OutOfMemoryError.\n\n\n\nThe impacted component is io.vertx:vertx-pg-client.","dates":{"published":"2026-10-15T08:13:41.485Z","modified":"2026-10-15T14:27:43.560Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.2,"severity":"high","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":8.2,"severity":"high","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":8.2,"severity":"high","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00282,"percentile":0.19439,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-15T00:00:00.000Z","score":0.00282,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00282,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00282,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00282,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00282,"percentile":0.19439}],"last30":[{"date":"2026-10-15T00:00:00.000Z","score":0.00282,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00282,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00282,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00282,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00282,"percentile":0.19439}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-789","name":"Memory Allocation with Excessive Size Value","description":"The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.","type":"weakness","status":"Draft","abstraction":"Variant","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/789.html"}],"affected":[{"vendor":"eclipse foundation","product":"eclipse vert.x","name":"Eclipse Vert.x","label":"eclipse vert.x","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 4.0.0, ≤ 4.5.34","noFixRecorded":false,"fixedIn":null},{"text":"≥ 5.0.0, ≤ 5.0.12","noFixRecorded":false,"fixedIn":null},{"text":"≥ 5.1.0, ≤ 5.1.9","noFixRecorded":false,"fixedIn":null},{"text":"5.2.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 4.0.0, ≤ 4.5.34 | ≥ 5.0.0, ≤ 5.0.12 | ≥ 5.1.0, ≤ 5.1.9 | 5.2.0","eol":null,"hubHref":"/vendor/eclipse_foundation/eclipse_vertx"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/eclipse-vertx/vertx-sql-client/security/advisories/GHSA-xqmh-8fhj-48fp","label":"github.com/eclipse-vertx/vertx-sql-client/security/advisories/GHSA-xqmh-8fhj-48fp","hostname":"github.com","tags":[]},{"url":"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/345","label":"gitlab.eclipse.org/security/cve-assignment/-/work_items/345","hostname":"gitlab.eclipse.org","tags":[]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-15T08:13:41.485Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-15T14:27:43.560Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":33,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T18:48:16.510Z","stale":false,"partial":false}}