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CVE-2026-123807— Signal K Server: Unauthenticated path traversal in resources-provider v2 API leads to JWT secret disclosure, admin impersonation and remote code execution

Quick assessment

Affected
SignalK signalk-server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Signal K Server 是一款运行在船舶中央集控单元上的服务器应用程序。在 Signal K Server 2.0.0 至 2.34.0 版本，以及 @signalk/resources-provider 1.0.0 至 1.5.3 版本中，v2 REST 接口 接受不安全的 参数，该参数可突破预期的资源目录限制。该路由将攻击者控制的 直接传递给 ，进而调用 中的 方法，由于缺乏充分的路径限制机制，攻击者可读取服务器可访问范围内的任意 JSON 文件。相关的 和 资源操作同样可写入或删除存储根目录之外的文件

CVSS 9.8 · Critical
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I. Basic Information for CVE-2026-123807

Vulnerability Information
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Vulnerability Title
Signal K Server: Unauthenticated path traversal in resources-provider v2 API leads to JWT secret disclosure, admin impersonation and remote code execution
Source: CVE Program / CVE List V5
Vulnerability Description
Signal K Server is a server application that runs on a central hub in a boat. From 2.0.0 until 2.34.0 for Signal K Server and from 1.0.0 until 1.5.3 for @signalk/resources-provider, the v2 REST route GET /signalk/v2/api/resources/:resourceType/:resourceId accepts an unsafe resourceId that can escape the intended resource directory. The route passes the attacker-controlled resourceId through src/api/resources/index.ts to FileStore.getResource() in packages/resources-provider-plugin/src/filestorage.ts without adequate path containment, allowing arbitrary JSON files reachable by the server to be read. Related PUT and DELETE resource operations can write or delete files outside the storage root. Deployments with allow_readonly enabled permit anonymous reads, while other deployments require a readonly user token. Reading security.json exposes the HS256 JWT signing secret and password hashes, allowing an attacker to forge an administrator token. Administrative access to POST /skServer/providers can then create an Execute provider that runs commands with the server process privileges and persists its configuration across restarts. This issue is fixed in Signal K Server 2.34.0 and @signalk/resources-provider 1.5.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
SignalK signalk-server >= 2.0.0, < 2.34.0 -
@signalk resources-provider >= 1.0.0, < 1.5.3 -

II. Public POCs for CVE-2026-123807

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III. Intelligence Information for CVE-2026-123807

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Vendor Pages for CVE-2026-123807 (1)

Other References for CVE-2026-123807 (2)

IV. Related Vulnerabilities

Same product: signalk-server
Same vendor: SignalK
Same weakness: CWE-22