High
Security advisory
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 Redis client RESP parser pre-allocates arrays to a length declared by the server without enforcing an upper bound. A malicious or compromised Redis server, or an attacker in a man-in-the-middle position, can send a crafted RESP response declaring an extremely large array, push, or attribute length, causing the client to attempt a massive heap allocation. The resulting OutOfMemoryError crashes the Vert.x event loop thread, denying service to all connections and verticles sharing that loop. The impacted component is io.vertx:vertx-mysql-client.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-102465
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 16:36 UTC · Revision 1
Source evidence
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 Redis client RESP parser pre-allocates arrays to a length declared by the server without enforcing an upper bound. A malicious or compromised Redis server, or an attacker in a man-in-the-middle position, can send a crafted RESP response declaring an extremely large array, push, or attribute length, causing the client to attempt a massive heap allocation. The resulting OutOfMemoryError crashes the Vert.x event loop thread, denying service to all connections and verticles sharing that loop. The impacted component is io.vertx:vertx-mysql-client.
osv:CVE-2026-102465
Complete source record
{
"id": "da34bd09c897f6b6723a14fa9e8c657227fd302924994593895273befd9a1bdb",
"url": "https://osv.dev/vulnerability/CVE-2026-102465",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2026-102465",
"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 Redis client RESP parser pre-allocates arrays to a length declared by the server without enforcing an upper bound. A malicious or compromised Redis server, or an attacker in a man-in-the-middle position, can send a crafted RESP response declaring an extremely large array, push, or attribute length, causing the client to attempt a massive heap allocation. The resulting OutOfMemoryError crashes the Vert.x event loop thread, denying service to all connections and verticles sharing that loop. The impacted component is io.vertx:vertx-mysql-client.",
"evidence": "osv:CVE-2026-102465",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-102465",
"aliases": [
"CVE-2026-102465",
"GHSA-4wf9-p5hg-98w5"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/eclipse-vertx/vert.x",
"type": "GIT",
"events": [
{
"introduced": "c343c7876fb7e78e6cd616fe1e0b86693de7c1a3"
},
{
"fixed": "a1a2c0971108288b55c0888610f82069be2af00f"
},
{
"introduced": "6feb3f329729d6c78f6544b542b1668a3e9f6704"
},
{
"fixed": "83dfa248747eb5bd5b8bacc7eec3b018fe8bb156"
},
{
"introduced": "a38832fbdabfa2fdb418988b9cc36831765a2ecd"
},
{
"last_affected": "a38832fbdabfa2fdb418988b9cc36831765a2ecd"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.5.0"
},
{
"fixed": "4.5.35"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.0.0"
},
{
"fixed": "5.1.10"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:eclipse:vert.x:5.2.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.2.0"
},
{
"last_affected": "5.2.0"
}
],
"source": "CPE_STRING"
}
]
}
},
{
"repo": "https://github.com/eclipse-vertx/vertx-sql-client",
"type": "GIT",
"events": [
{
"introduced": "f08d97e8e9a8ab5bbbc9e9f817edb99214d6b72e"
},
{
"fixed": "6b82c7eb66c5c6be65bec49c2ba6bcc4d2bc7254"
},
{
"introduced": "6837af793026a2fba5b6b32e0161fce6d9c8b691"
},
{
"fixed": "2427bef93e286ee0621875aa398c09ca5eedbfbd"
},
{
"introduced": "3708bdc1d328afce37abd39dba932399a0469742"
},
{
"last_affected": "3708bdc1d328afce37abd39dba932399a0469742"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.5.0"
},
{
"fixed": "4.5.35"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.0.0"
},
{
"fixed": "5.1.10"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:eclipse:vert.x:5.2.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.2.0"
},
{
"last_affected": "5.2.0"
}
],
"source": "CPE_STRING"
}
]
}
},
{
"repo": "https://github.com/vert-x3/vertx-redis-client",
"type": "GIT",
"events": [
{
"introduced": "ec18f32d04a29a396cb40d285ed5999339ed098f"
},
{
"last_affected": "ef864ffd290001ac491ef903cdf7699c78f239bd"
},
{
"introduced": "252e182e034dbfe6cd19dee39cf2cd2800b2c0ec"
},
{
"last_affected": "ff5af262f2259fa6d51414f7dc5b9c6fbfa6cb26"
},
{
"introduced": "bd79244a69bb1b9d3fd8b11fc6ccb6b2759790e2"
},
{
"last_affected": "49ea0e302ed3a9fc0d19d1252c8c769c2d1df4d0"
},
{
"introduced": "5ed71d30e497d7c8df733f9833cca56378c0c9f8"
},
{
"last_affected": "5ed71d30e497d7c8df733f9833cca56378c0c9f8"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "4.0.0"
},
{
"last_affected": "4.5.34"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "5.0.0"
},
{
"last_affected": "5.0.12"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "5.1.0"
},
{
"last_affected": "5.1.9"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "5.2.0"
},
{
"last_affected": "5.2.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandaloneSingleVersion"
}
]
}
},
{
"repo": "https://github.com/vert-x3/vertx-web",
"type": "GIT",
"events": [
{
"introduced": "bdaa091562e35878cd5780930f49c708b888b58a"
},
{
"fixed": "450fb5221bcca4f9ef8acbf8aefaad0331e85472"
},
{
"introduced": "a62720242d2f515969aa34dd185d870b846be5e1"
},
{
"fixed": "94c4294a0949675645472076cc452502d42f7586"
},
{
"introduced": "ff8e680573776ca8da999fb6c0ccc6318d5eaad0"
},
{
"last_affected": "ff8e680573776ca8da999fb6c0ccc6318d5eaad0"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.5.0"
},
{
"fixed": "4.5.35"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.0.0"
},
{
"fixed": "5.1.10"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:eclipse:vert.x:5.2.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.2.0"
},
{
"last_affected": "5.2.0"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"5.2.0",
"4.5.34",
"5.1.8",
"5.1.7",
"4.5.33",
"4.5.32",
"5.1.6",
"4.5.31",
"4.5.30",
"5.1.5",
"4.5.29",
"5.1.4",
"5.1.3",
"5.1.2",
"4.5.28",
"5.1.1",
"5.1.0",
"4.5.27",
"4.5.26",
"4.5.25",
"4.5.24",
"4.5.23",
"4.5.22",
"4.5.21",
"4.5.20",
"4.5.19",
"4.5.18",
"4.5.17",
"4.5.16",
"4.5.15",
"5.0.0",
"4.5.14",
"4.5.13",
"4.5.12",
"4.5.11",
"4.5.10",
"4.5.9",
"4.5.8",
"4.5.7",
"4.5.6",
"4.5.5",
"4.5.4",
"4.5.3",
"4.5.2",
"4.5.1",
"4.5.0",
"5.0.12",
"5.0.11",
"5.0.10",
"5.0.9",
"5.0.8",
"5.0.7",
"5.0.6",
"5.0.5",
"5.0.4",
"5.0.3",
"5.0.2",
"5.0.1",
"4.4.5",
"4.4.4",
"4.4.3",
"4.4.2",
"4.4.1",
"4.4.0",
"4.3.5",
"4.3.4",
"4.3.3",
"4.3.2",
"4.3.1",
"4.3.0",
"4.2.3",
"4.2.2",
"4.2.1",
"4.2.0",
"4.2.0.Beta1",
"4.1.1",
"4.1.0",
"4.1.0.CR2",
"4.1.0.CR1",
"4.1.0.Beta1",
"4.0.3",
"4.0.2",
"4.0.1",
"4.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102465.json"
}
}
],
"modified": "2026-10-28T02:30:44.321999255Z",
"provider": "osv",
"references": [
"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/343",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102465.json",
"https://github.com/vert-x3/vertx-redis-client/security/advisories/GHSA-4wf9-p5hg-98w5",
"https://nvd.nist.gov/vuln/detail/CVE-2026-102465"
],
"provider_metadata": {
"cna_assigner": "eclipse",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102465.json"
}
},
"related_cves": [
{
"value": "CVE-2026-102465",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 512419,
"published_at": "2026-10-15T07:27:55.055+00:00"
}