HOMEVULNERABILITIESCVE-2026-33951
HIGH

CVE-2026-33951

CWE-284Published: April 2, 2026· Updated: Apr 6, 2026

7.5
CVSS v3.1
EPSS:0.29%probability of exploitation in 30 daysPercentile:52.5th

Official Description

Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.24.0-beta.1, the SignalK Server exposes an unauthenticated HTTP endpoint that allows remote attackers to modify navigation data source priorities. This endpoint, accessible via PUT /signalk/v1/api/sourcePriorities, does not enforce authentication or authorization checks and directly assigns user-controlled input to the server configuration. As a result, attackers can influence which GPS, AIS, or other sensor data sources are trusted by the system. The changes are immediately applied and persisted to disk, allowing the manipulation to survive server restarts. This issue has been patched in version 2.24.0-beta.1.

NVD Source

Technical Analysis

CVE-2026-33951 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

signalk1 product
signal k server
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

ADVISORYhttps://github.com/SignalK/signalk-server/security/advisories/GHSA-gfmv-vh34-h2x5

All References (2)

→
https://github.com/SignalK/signalk-server/releases/tag/v2.24.0-beta.1Product · Release Notes
→
https://github.com/SignalK/signalk-server/security/advisories/GHSA-gfmv-vh34-h2x5Vendor Advisory

Quick Facts

CVE IDCVE-2026-33951
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-284
CISA KEVNo
EPSS (30d)0.29%
Affected1 vendor
PublishedApr 2, 2026

Related CVEs (CWE-284)

CVE-2026-35307
10.0
CVE-2026-46695
10.0
CVE-2026-34908
KEV10.0
CVE-2026-30966
10.0
CVE-2026-32737
10.0
CVE-2026-35308
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-33951 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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