High 7.3Published Jun 25, 2026

CVE-2026-56790CANBoat - Off-by-One Global Buffer Overflow in searchForPgn()

Updated under an hour ago (Oct 28, 2026, 7:00 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 7.3 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H
Weakness (CWE): CWE-193
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

canboat canboat canboat:canboat (from the name)	through 6.22; a5a22b74b9ac5688019cba62669df08562cebd6f not affected	CNA record

References

References

https://github.com/canboat/canboat/issues/644	technical-description, exploit
https://github.com/canboat/canboat/pull/649	issue-tracking
https://github.com/canboat/canboat/commit/a5a22b74b9ac5688019cba62669df08562cebd6f	patch
https://www.vulncheck.com/advisories/canboat-off-by-one-global-buffer-overflow-in-searchforpgn	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.