---
id: "CVE-2026-117685"
kind: "vulnerability"
aliases: ["CVE-2026-117685"]
title: "OCI registry blob mount lets a token copy private package data public"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["container-registry", "infrastructure", "oci-registry", "self-hosted"]
not_affected_if: ["no-private-packages", "no-public-only-tokens"]
published_at: "2026-11-01T10:18:35+00:00"
first_seen_at: "2026-11-01T10:49:33+00:00"
updated_at: "2026-11-01T10:51:27+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-117685", "first_seen_at": "2026-11-01T10:49:33+00:00"}]
---

# OCI registry blob mount lets a token copy private package data public

The OCI registry's cross-repository blob mount checked the target package against a token's public-only restriction but checked the source blob only against the token owner's full permissions. A public-only token with write scope could mount a private package's blob, such as a container layer, into a public package, where anyone can download it.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-11-01T10:49:33+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-117685

## From the sources

The OCI registry's cross-repository blob mount checked the target package against the token's `public-only` restriction, but checked the source blob only against the full account permissions of the token owner. A `public-only` token with `write:package` scope, whose owner can read a private package and write to a public package namespace, could mount a blob of the private package into the public package. The private blob, such as a container layer, could then be downloaded by anyone through the public package.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_