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CVE-2026-47699— Confidential Containers Guest Components image-rs: zip-slip-class arbitrary file write via absolute entry path in hardlink fallback

Quick assessment

Affected
confidential-containers guest-components
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Confidential Containers 的 Guest Components 为机密容器工作负载提供客户机工具和组件。在 0.16.0 至 0.20.0 版本中，恶意构造的 OCI 镜像层可导致 image_rs::stream::unpack::unpack() 在目标目录之外创建硬链接。 在 image-rs/src/stream/unpack.rs 文件中，try_hardlink_fallback() 函数虽然对硬链接源路径进行了验证，但其目的路径是通过 destination.join(&entr

CVSS 6.4 · Medium EPSS 0.29% · P22

Possible ATT&CK Techniques 1 AI

T1610 · Deploy Container

Affected Version Matrix 1

VendorProduct Version RangeStatus
confidential-containers guest-components >= 0.16.0, < 0.20.0 affected
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I. Basic Information for CVE-2026-47699

Vulnerability Information
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Vulnerability Title
Confidential Containers Guest Components image-rs: zip-slip-class arbitrary file write via absolute entry path in hardlink fallback
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
confidential-containers guest-components >= 0.16.0, < 0.20.0 -

II. Public POCs for CVE-2026-47699

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III. Intelligence Information for CVE-2026-47699

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Patches & Fixes for CVE-2026-47699 (3)

Vendor Advisories for CVE-2026-47699 (1)

Vendor Pages for CVE-2026-47699 (1)

IV. Related Vulnerabilities

Same vendor: confidential-containers
Same weakness: CWE-22

V. Comments for CVE-2026-47699

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