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vuln-cve/data/2026/56xxx/CVE-2026-56790.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-56790",
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"state": "PUBLISHED",
"assignerShortName": "VulnCheck",
"dateReserved": "2026-06-23T01:24:27.652Z",
"datePublished": "2026-06-25T18:14:48.573Z",
"dateUpdated": "2026-11-08T14:06:28.433Z"
},
"containers": {
"cna": {
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"shortName": "VulnCheck",
"dateUpdated": "2026-11-08T14:06:28.433Z"
},
"datePublic": "2026-06-09T00:00:00.000Z",
"title": "CANBoat - Off-by-One Global Buffer Overflow in searchForPgn()",
"descriptions": [
{
"lang": "en",
"value": "CANBoat through 6.22, fixed in commit a5a22b7, contains an off-by-one global buffer overflow in the searchForPgn() function in analyzer/pgn.c that allows remote attackers to crash the application. Attackers can deliver a crafted NMEA-2000 message with an out-of-range PGN value over CAN bus or N2K-over-IP to trigger an out-of-bounds array access and denial of service."
}
],
"tags": [
"x_open-source"
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-193",
"description": "Off-by-one Error",
"type": "CWE"
}
]
}
],
"affected": [
{
"vendor": "canboat",
"product": "canboat",
"defaultStatus": "unaffected",
"packageURL": "pkg:github/canboat/canboat",
"versions": [
{
"version": "0",
"status": "affected",
"versionType": "custom",
"lessThanOrEqual": "6.22"
},
{
"status": "unaffected",
"version": "a5a22b74b9ac5688019cba62669df08562cebd6f",
"versionType": "git"
}
],
"repo": "https://github.com/canboat/canboat"
}
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"value": "GENERAL"
}
],
"cvssV4_0": {
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"userInteraction": "PASSIVE",
"vulnConfidentialityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH",
"subIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "HIGH",
"subAvailabilityImpact": "NONE",
"exploitMaturity": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED",
"version": "4.0",
"baseSeverity": "HIGH",
"baseScore": 7,
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N"
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"cvssV3_1": {
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"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "UNCHANGED",
"confidentialityImpact": "LOW",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH",
"version": "3.1",
"baseSeverity": "HIGH",
"baseScore": 7.3,
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H"
}
}
],
"references": [
{
"url": "https://github.com/canboat/canboat/issues/644",
"name": "Researcher Disclosure",
"tags": [
"technical-description",
"exploit",
"issue-tracking"
]
},
{
"url": "https://github.com/canboat/canboat/pull/649",
"name": "Pull Request",
"tags": [
"issue-tracking",
"patch"
]
},
{
"url": "https://github.com/canboat/canboat/commit/a5a22b74b9ac5688019cba62669df08562cebd6f",
"name": "Patch Commit",
"tags": [
"patch"
]
},
{
"url": "https://www.vulncheck.com/advisories/canboat-off-by-one-global-buffer-overflow-in-searchforpgn",
"tags": [
"third-party-advisory"
]
}
],
"credits": [
{
"lang": "en",
"value": "FuzzingLabs",
"type": "finder"
}
],
"x_generator": {
"engine": "vulncheck"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-06-25T21:36:05.015469Z",
"id": "CVE-2026-56790",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-06-26T17:44:21.741Z"
}
}
]
}
}