What is CVE-2026-56790?

CVE-2026-56790 is a high-severity vulnerability in Canboat, classified under Off-by-one Error. CVSS score: 7.3/10. Published 2026-06-25.

How severe is CVE-2026-56790?

High severity. CVSS v3 base score is 7.3 out of 10.

Vulnerability in Canboat

CVE-2026-56790

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…

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H.

Affected products

Canboat — versions 0, a5a22b74b9ac5688019cba62669df08562cebd6f

Weakness classification (CWE)

CWE-193 — Off-by-one Error

References

disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-56790?: CVE-2026-56790 is a high-severity vulnerability in Canboat, classified under Off-by-one Error. CVSS score: 7.3/10. Published 2026-06-25.
How severe is CVE-2026-56790?: High severity. CVSS v3 base score is 7.3 out of 10.