Detections
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SCA: security update for github.com/modelcontextprotocol/registry (GHSA-95c3-6vvw-4mrq)

low Tenable Cloud Security Plugin ID 441538

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. Prior
 to 1.7.6, the client-side and server-side GitHub OIDC flow is bound only to a global audience string, not
 to the specific registry instance being targeted. On the client side, the publisher always appends
 audience=mcp-registry when requesting the GitHub Actions ID token, regardless of the selected --registry
 URL. On the server side, the exchange endpoint validates only that same fixed audience and then derives
 publish permissions directly from repository_owner. As a result, a token legitimately obtained while
 interacting with one registry deployment remains acceptable to any other deployment that shares the same
 code and audience string. This vulnerability is fixed in 1.7.6. (CVE-2026-44428)

Solution

Update the github.com/modelcontextprotocol/registry library and its related packages to version 1.7.6 or later.

See Also

https://github.com/advisories/GHSA-95c3-6vvw-4mrq

Plugin Details

Severity: Low

ID: 441538

Version: Revision 1.6

Type: Local

Family: SCA Checks

Published: 5/8/2026

Updated: 6/30/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Low

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2026-44428

CVSS v3

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 4.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Low

Base Score: 2.1

Threat Score: 0.5

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 5/8/2026

Vulnerability Publication Date: 5/8/2026

Reference Information

CVE: CVE-2026-44428

cwe: CWE-918