What is CVE-2026-45781?

CVE-2026-45781 is a low-severity vulnerability in Modelcontextprotocol Registry, classified under CWE-636. CVSS score: 3.5/10. Published 2026-05-14.

How severe is CVE-2026-45781?

Low severity. CVSS v3 base score is 3.5 out of 10.

Vulnerability in Modelcontextprotocol Registry

CVE-2026-45781

The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. Prior to 1.7.9, OCI ownership validation skips label-match check when upstream OCI registry returns HTTP 429, letting any authenticated pu…

EPSS: 0.000 (1.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N.

Affected products

Modelcontextprotocol Registry — versions < 1.7.9

Weakness classification (CWE)

CWE-636

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-45781?: CVE-2026-45781 is a low-severity vulnerability in Modelcontextprotocol Registry, classified under CWE-636. CVSS score: 3.5/10. Published 2026-05-14.
How severe is CVE-2026-45781?: Low severity. CVSS v3 base score is 3.5 out of 10.