What is CVE-2026-49856?

CVE-2026-49856 is a medium-severity vulnerability in Vmoranv Jshookmcp, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.3/10. Published 2026-08-13.

How severe is CVE-2026-49856?

Medium severity. CVSS v3 base score is 4.3 out of 10.

SSRF in Vmoranv Jshookmcp

CVE-2026-49856

@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 reserve…

Vulnerability class: SSRF (Server-Side Request Forgery)

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Vmoranv Jshookmcp — versions = 0.3.1

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-49856?: CVE-2026-49856 is a medium-severity vulnerability in Vmoranv Jshookmcp, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.3/10. Published 2026-08-13.
How severe is CVE-2026-49856?: Medium severity. CVSS v3 base score is 4.3 out of 10.