{"cve":"CVE-2026-49856","nvd":{"published":"2026-08-13T15:19:41.563","modified":"2026-10-24T16:10:00.153","status":"Deferred","description":"@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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":4.3},"cwes":["CWE-918"],"references":["https://github.com/vmoranv/jshookmcp/commit/02111311f7bd0f86a7d7ef8538986594b3a18afa","https://github.com/vmoranv/jshookmcp/security/advisories/GHSA-c5r6-m4mr-8q5j","https://github.com/vmoranv/jshookmcp/security/advisories/GHSA-c5r6-m4mr-8q5j"],"products":[],"source":"nvd","synced_at":"2026-10-24T16:53:35.584907681+00:00"},"epss":{"cve":"CVE-2026-49856","score":0.00281,"percentile":0.20382,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-c5r6-m4mr-8q5j","url":"https://osv.dev/vulnerability/GHSA-c5r6-m4mr-8q5j","summary":"@jshookmcp/jshook: ICMP probe and traceroute skip local-network SSRF authorization","modified":"2026-09-10T03:51:11.398341013Z","packages":[{"ecosystem":"npm","name":"@jshookmcp/jshook","purl":"pkg:npm/%40jshookmcp/jshook","ranges":[">=0.3.1 <0.3.2"],"fixed":["0.3.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}