CVE-2026-49856
CVE-2026-49856 · @jshookmcp/jshook: ICMP probe and traceroute skip local-network SSRF authorization
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@jshookmcp/jshook is an MCP server that gives AI agents tools for JavaScript analysis and security research. In version 0.3.1, he network domain has a central SSRF authorization policy that blocks private, loopback, link-local, and reserved targets unless an explicit authorization object allows private network access. The policy is enforced by raw HTTP/TCP/TLS RTT tools, but the ICMP probe and traceroute tools resolve the target and invoke the native ICMP/traceroute sink directly. An MCP client with access to an active network domain can therefore ask the jshookmcp server to probe internal addresses even when local SSRF access is disabled for the other raw network tools. This exposes an internal reachability and route mapping primitive from the server network position. Version 0.3.2 fixes the issue.
CVSS 4.3 · Moyenne · EPSS 0,3% · Correctif disponible
- Publication
- Mise à jour
Pile logicielle: node
Produits et versions concernés
jshookmcp
- Versions du logiciel
- = 0.3.1: Concernée
Aucun correctif publié
@jshookmcp/jshook npm
- Versions du logiciel
- 0.3.1
- Plages de versions concernées
- SEMVER: ≥ 0.3.1, < 0.3.2
Mettez à jour vers 0.3.2