---
id: CVE-2026-47699
title: >-
  Confidential Containers Guest Components provides guest tools and components
  for confidential container workloads
summary: >-
  Confidential Containers Guest Components provides guest tools and components
  for confidential container workloads. From 0.16.0 until 0.20.0, a crafted OCI
  image layer can make image_rs::stream::unpack::unpack() create a hardlink
  outside …
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-22
  - CWE-59
published: '2026-08-18'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:13:25.910'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-47699'
references:
  - url: >-
      https://github.com/confidential-containers/guest-components/commit/14fbb711af0b29bb9cad307969d57b0de9b85d7f
    label: security-advisories@github.com
  - url: >-
      https://github.com/confidential-containers/guest-components/commit/7cc1bc458973310296e58aedbb15cb7963297bbe
    label: security-advisories@github.com
  - url: 'https://github.com/confidential-containers/guest-components/pull/1440'
    label: security-advisories@github.com
  - url: 'https://github.com/confidential-containers/guest-components/pull/1457'
    label: security-advisories@github.com
  - url: >-
      https://github.com/confidential-containers/guest-components/releases/tag/v0.20.0
    label: security-advisories@github.com
  - url: >-
      https://github.com/confidential-containers/guest-components/security/advisories/GHSA-84rc-2q4r-45pc
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.0029
epssPercentile: 0.21797
ingestedAt: '2026-09-09T21:22:45.538Z'
---

## Overview

Confidential Containers Guest Components provides guest tools and components for confidential container workloads. From 0.16.0 until 0.20.0, a crafted OCI image layer can make image_rs::stream::unpack::unpack() create a hardlink outside its destination directory. In image-rs/src/stream/unpack.rs, try_hardlink_fallback() validates the hardlink source but computes the destination with destination.join(&entry_rel). Rust Path::join replaces the base when entry_rel is an absolute tar entry path, so fs::hard_link(&src_canon, &dst_entry_abs) can write attacker-controlled content to an arbitrary absolute path. In Confidential Containers the workload owner already controls trusted image content, so the issue is a workload-owner escape into the pod virtual machine rather than a crossing of the image trust boundary, but it may enable access to pod virtual machine capabilities and attestation abuse. This issue is fixed in version 0.20.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.