What is CVE-2026-51994?

CVE-2026-51994 is a critical-severity vulnerability in N/a, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.1/10. Published 2026-09-24.

How severe is CVE-2026-51994?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2026-51994 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

SSRF in N/a

CVE-2026-51994

mcp-remote versions 0.1.32 through 0.1.38 are vulnerable to Server-Side Request Forgery (SSRF) via the resource_metadata URL extracted from a remote MCP server's WWW-Authenticate header

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2026-09-24 · last modified 2026-09-25.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (39.2th percentile), scored 2026-11-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.001

Weakness classification (CWE)

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

Public proof-of-concept exploits

playb0t/mcp-remote-oauth-security

References

Frequently asked questions

What is CVE-2026-51994?: CVE-2026-51994 is a critical-severity vulnerability in N/a, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.1/10. Published 2026-09-24.
How severe is CVE-2026-51994?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2026-51994 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.