---
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
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47699.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-47699'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2519265'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-47699'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-47699'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
epss: 0.0029
epssPercentile: 0.21438
ingestedAt: '2026-09-09T21:22:45.538Z'
vendor: Red Hat
product: Red Hat OpenShift Container Platform 4
affected:
  - confidential_compute_attestation
  - enterprise_linux 10
  - enterprise_linux 9
  - openshift_container_platform 4
---

## 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.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Confidential Compute Attestation, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Confidential Compute Attestation, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47699.json)