Dashboard / CVE-2026-45781

CVE-2026-45781

LOW
INFO Priority: 0.01 BB Relevance: 47/100
Published: 2026-05-14 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: Required
S: Unchanged
C: None
I: Low
A: None

Description

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 publisher bind their io.github.<user>/* namespace to OCI images they do not control. internal/validators/registries/oci.go:104-119 fails open on http.StatusTooManyRequests: when the registry's anonymous fetch to the upstream OCI registry is rate-limited, ValidateOCI returns nil and the publish is accepted without ever running the io.modelcontextprotocol.server.name label-match check at lines 122-141. That label check is the only cross-system ownership proof the registry applies to OCI packages — every other registry type (NPM, PyPI, NuGet, MCPB) treats a non-200 upstream response as a hard error. This vulnerability is fixed in 1.7.9.

Weakness Classification (1)

References & Advisories (1)

Bug Bounty Relevance

47 / 100
✓ Network accessible
✓ Low complexity

CVSS Score

3.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

EPSS — Exploitation Probability

0.23%
Raw Score 0.002330
Percentile 14.3%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00233
2026-10-28
0.00233

Intelligence Sources

nvd ref →

External Links