CVE-2026-51994Critical· 9.1▾ AbyssalPoC available

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

▾ Abyssal zone — Critical with a public exploit or in-the-wild use

Depth score62/ 100 · Elevated

impact 50.1 · likelihood 0.1 · exploitation 12

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

A public proof-of-concept already exists for this vulnerability — see Exploit availability below.

…

Published

Sep 24, 2026

Updated

Sep 25, 2026

CVSS

9.1

Vendor

—

Product

—

CWE

CWE-918

Depth score

62 · Elevated

EPSS

0.35% · p29

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploit availability

Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.

checked 2026-10-27

GitHub PoCs

1 public repository

playb0t/mcp-remote-oauth-security ↗

CISA SSVC

decided 2026-09-25

Exploitation: none
Automatable: yes
Technical impact: total

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Sep 26.

0.2% → 0.4%▲ 0.2%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

7 events · 19 days

Sep 24, 2026Published
Disclosed via NVD
Sep 25, 2026Record revised
Last analysed / modified upstream
Sep 25, 2026CVSS changed
— → 9.1
Sep 25, 2026Severity changed
none → critical
Sep 26, 2026EPSS first tracked
0.2%
Sep 27, 2026EPSS peak
0.2% → 0.4%
Oct 12, 2026Public exploit observed
1 GitHub repo

CWE-918 #nvd #cve.org #exploit-available

Full technical detail▾

Overview

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

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Change history

Field changes observed since this record was first indexed.

Oct 12, 2026Public exploit / PoC published
Sep 25, 2026CVSS — → 9.1
Sep 25, 2026Severity none → critical

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org#exploit-available

← Back to feed

CVE-2026-51994Critical· 9.1▾ AbyssalPoC available

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

▾ Abyssal zone — Critical with a public exploit or in-the-wild use

Depth score62/ 100 · Elevated

impact 50.1 · likelihood 0.1 · exploitation 12

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

A public proof-of-concept already exists for this vulnerability — see Exploit availability below.

…

Published

Sep 24, 2026

Updated

Sep 25, 2026

CVSS

9.1

Vendor

—

Product

—

CWE

CWE-918

Depth score

62 · Elevated

EPSS

0.35% · p29

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploit availability

Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.

checked 2026-10-27

GitHub PoCs

1 public repository

playb0t/mcp-remote-oauth-security ↗

CISA SSVC

decided 2026-09-25

Exploitation: none
Automatable: yes
Technical impact: total

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Sep 26.

0.2% → 0.4%▲ 0.2%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

7 events · 19 days

Sep 24, 2026Published
Disclosed via NVD
Sep 25, 2026Record revised
Last analysed / modified upstream
Sep 25, 2026CVSS changed
— → 9.1
Sep 25, 2026Severity changed
none → critical
Sep 26, 2026EPSS first tracked
0.2%
Sep 27, 2026EPSS peak
0.2% → 0.4%
Oct 12, 2026Public exploit observed
1 GitHub repo

CWE-918 #nvd #cve.org #exploit-available

Full technical detail▾

Overview

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

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Change history

Field changes observed since this record was first indexed.

Oct 12, 2026Public exploit / PoC published
Sep 25, 2026CVSS — → 9.1
Sep 25, 2026Severity none → critical

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org#exploit-available