6.5
MEDIUM
CVSS 3.1
CVE-2026-35038
signalk-server: Arbitrary Prototype Read via `from` Field Bypass
Overview
Description
Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.24.0, there is an arbitrary prototype read vulnerability via `from` field bypass. This vulnerability allows a low-privileged authenticated user to bypass prototype boundary filtering to extract internal functions and properties from the global prototype object this violates data isolation and lets a user read more than they should. This issue has been patched in version 2.24.0.
Details
INFO
Published Date :
April 2, 2026, 5:16 p.m.
Last Modified :
July 21, 2026, 7:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
Update Signal K Server to version 2.24.0 or later to fix arbitrary prototype read vulnerability.
- Update Signal K Server to version 2.24.0 or later.
- Apply vendor patches as soon as possible.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-35038.
| URL | Resource |
|---|---|
| https://github.com/SignalK/signalk-server/releases/tag/v2.24.0 | Product Release Notes |
| https://github.com/SignalK/signalk-server/security/advisories/GHSA-qh3j-mrg8-f234 | Exploit Mitigation Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-35038 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-35038
weaknesses.
CAPEC-3: Using Leading 'Ghost' Character Sequences to Bypass Input Filters Using Leading 'Ghost' Character Sequences to Bypass Input Filters
CAPEC-7: Blind SQL Injection Blind SQL Injection
CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call
CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities
CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables
CAPEC-13: Subverting Environment Variable Values Subverting Environment Variable Values
CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow
CAPEC-22: Exploiting Trust in Client Exploiting Trust in Client
CAPEC-23: File Content Injection File Content Injection
CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow
CAPEC-28: Fuzzing Fuzzing
CAPEC-31: Accessing/Intercepting/Modifying HTTP Cookies Accessing/Intercepting/Modifying HTTP Cookies
CAPEC-42: MIME Conversion MIME Conversion
CAPEC-43: Exploiting Multiple Input Interpretation Layers Exploiting Multiple Input Interpretation Layers
CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links
CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags
CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion
CAPEC-52: Embedding NULL Bytes Embedding NULL Bytes
CAPEC-53: Postfix, Null Terminate, and Backslash Postfix, Null Terminate, and Backslash
CAPEC-63: Cross-Site Scripting (XSS) Cross-Site Scripting (XSS)
CAPEC-64: Using Slashes and URL Encoding Combined to Bypass Validation Logic Using Slashes and URL Encoding Combined to Bypass Validation Logic
CAPEC-67: String Format Overflow in syslog() String Format Overflow in syslog()
CAPEC-71: Using Unicode Encoding to Bypass Validation Logic Using Unicode Encoding to Bypass Validation Logic
CAPEC-72: URL Encoding URL Encoding
CAPEC-73: User-Controlled Filename User-Controlled Filename
CAPEC-78: Using Escaped Slashes in Alternate Encoding Using Escaped Slashes in Alternate Encoding
CAPEC-79: Using Slashes in Alternate Encoding Using Slashes in Alternate Encoding
CAPEC-80: Using UTF-8 Encoding to Bypass Validation Logic Using UTF-8 Encoding to Bypass Validation Logic
CAPEC-81: Web Server Logs Tampering Web Server Logs Tampering
CAPEC-83: XPath Injection XPath Injection
CAPEC-85: AJAX Footprinting AJAX Footprinting
CAPEC-88: OS Command Injection OS Command Injection
CAPEC-101: Server Side Include (SSI) Injection Server Side Include (SSI) Injection
CAPEC-104: Cross Zone Scripting Cross Zone Scripting
CAPEC-108: Command Line Execution through SQL Injection Command Line Execution through SQL Injection
CAPEC-109: Object Relational Mapping Injection Object Relational Mapping Injection
CAPEC-110: SQL Injection through SOAP Parameter Tampering SQL Injection through SOAP Parameter Tampering
CAPEC-120: Double Encoding Double Encoding
CAPEC-135: Format String Injection Format String Injection
CAPEC-136: LDAP Injection LDAP Injection
CAPEC-153: Input Data Manipulation Input Data Manipulation
CAPEC-182: Flash Injection Flash Injection
CAPEC-209: XSS Using MIME Type Mismatch XSS Using MIME Type Mismatch
CAPEC-230: Serialized Data with Nested Payloads Serialized Data with Nested Payloads
CAPEC-231: Oversized Serialized Data Payloads Oversized Serialized Data Payloads
CAPEC-250: XML Injection XML Injection
CAPEC-261: Fuzzing for garnering other adjacent user/sensitive data Fuzzing for garnering other adjacent user/sensitive data
CAPEC-267: Leverage Alternate Encoding Leverage Alternate Encoding
CAPEC-473: Signature Spoof Signature Spoof
CAPEC-588: DOM-Based XSS DOM-Based XSS
CAPEC-664: Server Side Request Forgery Server Side Request Forgery
CAPEC-540: Overread Buffers Overread Buffers
CAPEC-13: Subverting Environment Variable Values Subverting Environment Variable Values
CAPEC-22: Exploiting Trust in Client Exploiting Trust in Client
CAPEC-59: Session Credential Falsification through Prediction Session Credential Falsification through Prediction
CAPEC-60: Reusing Session IDs (aka Session Replay) Reusing Session IDs (aka Session Replay)
CAPEC-79: Using Slashes in Alternate Encoding Using Slashes in Alternate Encoding
CAPEC-116: Excavation Excavation
CAPEC-169: Footprinting Footprinting
CAPEC-224: Fingerprinting Fingerprinting
CAPEC-285: ICMP Echo Request Ping ICMP Echo Request Ping
CAPEC-287: TCP SYN Scan TCP SYN Scan
CAPEC-290: Enumerate Mail Exchange (MX) Records Enumerate Mail Exchange (MX) Records
CAPEC-291: DNS Zone Transfers DNS Zone Transfers
CAPEC-292: Host Discovery Host Discovery
CAPEC-293: Traceroute Route Enumeration Traceroute Route Enumeration
CAPEC-294: ICMP Address Mask Request ICMP Address Mask Request
CAPEC-295: Timestamp Request Timestamp Request
CAPEC-296: ICMP Information Request ICMP Information Request
CAPEC-297: TCP ACK Ping TCP ACK Ping
CAPEC-298: UDP Ping UDP Ping
CAPEC-299: TCP SYN Ping TCP SYN Ping
CAPEC-300: Port Scanning Port Scanning
CAPEC-301: TCP Connect Scan TCP Connect Scan
CAPEC-302: TCP FIN Scan TCP FIN Scan
CAPEC-303: TCP Xmas Scan TCP Xmas Scan
CAPEC-304: TCP Null Scan TCP Null Scan
CAPEC-305: TCP ACK Scan TCP ACK Scan
CAPEC-306: TCP Window Scan TCP Window Scan
CAPEC-307: TCP RPC Scan TCP RPC Scan
CAPEC-308: UDP Scan UDP Scan
CAPEC-309: Network Topology Mapping Network Topology Mapping
CAPEC-310: Scanning for Vulnerable Software Scanning for Vulnerable Software
CAPEC-312: Active OS Fingerprinting Active OS Fingerprinting
CAPEC-313: Passive OS Fingerprinting Passive OS Fingerprinting
CAPEC-317: IP ID Sequencing Probe IP ID Sequencing Probe
CAPEC-318: IP 'ID' Echoed Byte-Order Probe IP 'ID' Echoed Byte-Order Probe
CAPEC-319: IP (DF) 'Don't Fragment Bit' Echoing Probe IP (DF) 'Don't Fragment Bit' Echoing Probe
CAPEC-320: TCP Timestamp Probe TCP Timestamp Probe
CAPEC-321: TCP Sequence Number Probe TCP Sequence Number Probe
CAPEC-322: TCP (ISN) Greatest Common Divisor Probe TCP (ISN) Greatest Common Divisor Probe
CAPEC-323: TCP (ISN) Counter Rate Probe TCP (ISN) Counter Rate Probe
CAPEC-324: TCP (ISN) Sequence Predictability Probe TCP (ISN) Sequence Predictability Probe
CAPEC-325: TCP Congestion Control Flag (ECN) Probe TCP Congestion Control Flag (ECN) Probe
CAPEC-326: TCP Initial Window Size Probe TCP Initial Window Size Probe
CAPEC-327: TCP Options Probe TCP Options Probe
CAPEC-328: TCP 'RST' Flag Checksum Probe TCP 'RST' Flag Checksum Probe
CAPEC-329: ICMP Error Message Quoting Probe ICMP Error Message Quoting Probe
CAPEC-330: ICMP Error Message Echoing Integrity Probe ICMP Error Message Echoing Integrity Probe
CAPEC-472: Browser Fingerprinting Browser Fingerprinting
CAPEC-497: File Discovery File Discovery
CAPEC-508: Shoulder Surfing Shoulder Surfing
CAPEC-573: Process Footprinting Process Footprinting
CAPEC-574: Services Footprinting Services Footprinting
CAPEC-575: Account Footprinting Account Footprinting
CAPEC-576: Group Permission Footprinting Group Permission Footprinting
CAPEC-577: Owner Footprinting Owner Footprinting
CAPEC-616: Establish Rogue Location Establish Rogue Location
CAPEC-643: Identify Shared Files/Directories on System Identify Shared Files/Directories on System
CAPEC-646: Peripheral Footprinting Peripheral Footprinting
CAPEC-651: Eavesdropping Eavesdropping
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-35038 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-35038 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 21, 2026
Action Type Old Value New Value Added Translation Title: signalk-server de SignalK, Description: Signal K Server es una aplicación de servidor que se ejecuta en un concentrador central en un barco. Antes de la versión 2.24.0, existe una vulnerabilidad de lectura arbitraria de prototipos a través de un bypass del campo 'from'. Esta vulnerabilidad permite a un usuario autenticado con bajos privilegios eludir el filtrado de límites de prototipos para extraer funciones y propiedades internas del objeto prototipo global, esto viola el aislamiento de datos y permite a un usuario leer más de lo que debería. Este problema ha sido parcheado en la versión 2.24.0. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'SignalK', 'product': 'signalk-server', 'versions': [{'status': 'affected', 'version': '< 2.24.0'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-35038', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-04-02T18:46:22.506545Z'} -
Data Remediation by [email protected]
Apr. 29, 2026
Action Type Old Value New Value Changed CVSS V4.0 Score 5.3 2.1 -
Initial Analysis by [email protected]
Apr. 06, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Added CPE Configuration OR *cpe:2.3:a:signalk:signal_k_server:*:*:*:*:*:*:*:* versions up to (excluding) 2.24.0 Added Reference Type GitHub, Inc.: https://github.com/SignalK/signalk-server/releases/tag/v2.24.0 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/SignalK/signalk-server/security/advisories/GHSA-qh3j-mrg8-f234 Types: Exploit, Mitigation, Vendor Advisory -
New CVE Received by [email protected]
Apr. 02, 2026
Action Type Old Value New Value Added Description Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.24.0, there is an arbitrary prototype read vulnerability via `from` field bypass. This vulnerability allows a low-privileged authenticated user to bypass prototype boundary filtering to extract internal functions and properties from the global prototype object this violates data isolation and lets a user read more than they should. This issue has been patched in version 2.24.0. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-200 Added CWE CWE-20 Added CWE CWE-125 Added Reference https://github.com/SignalK/signalk-server/releases/tag/v2.24.0 Added Reference https://github.com/SignalK/signalk-server/security/advisories/GHSA-qh3j-mrg8-f234
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.