CANBoat through 6.22, fixed
Source GCVE Database
Not known to be exploited · CVSS 7.3 High.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 23% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Affects
- service. CANBoat through 6.22
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 25 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
Description
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.
References
- nvd.nist.gov/vuln/detail/CVE-2026-56790 (opens in a new tab)
- github.com/canboat/canboat/issues/644 (opens in a new tab)
- github.com/canboat/canboat/pull/649 (opens in a new tab)
- github.com/canboat/canboat/commit/a5a22b74b9ac5688019cba62669df08562cebd6f (opens in a new tab)
- vulncheck.com/advisories/canboat-off-by-one-global-buffer-overflow-in-searchforpgn (opens in a new tab)