Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The Go module github.com/modelcontextprotocol/registry is affected in versions before 1.7.9. When the upstream OCI registry returns HTTP 429 (rate limiting) during package validation, the OCI ownership check is skipped and the publish is accepted. An attacker with a free GitHub account could use this to bind a server record under their own namespace to a public OCI image they do not control. Upgrade to version 1.7.9 or later. The source gives few details on workarounds.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 3.5 | Low | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0023, the 14th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:13 UTC First seen by agentprime
- 31 Oct 2026, 14:13 UTC Confirmed by OSV