CVE-2026-47699
Medium · CVSS 6.4Published 2026-08-18
CVSS
6.4
Medium
EPSS
—
exploit probability
Active Exploit
No
not yet listed
What is CVE-2026-47699?
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.
CVSS Score Explained
CVSS 6.4 is Medium severity. Exploitation usually requires some specific conditions (local access, user interaction, or a particular config). Still worth patching in your next maintenance window.
EPSS Exploitation Probability
No EPSS score yet — model needs more data on this CVE.
References & Patches
- ›https://github.com/confidential-containers/guest-components/commit/14fbb711af0b29bb9cad307969d57b0de9b85d7f
- ›https://github.com/confidential-containers/guest-components/commit/7cc1bc458973310296e58aedbb15cb7963297bbe
- ›https://github.com/confidential-containers/guest-components/pull/1440
- ›https://github.com/confidential-containers/guest-components/pull/1457
- PATCHhttps://github.com/confidential-containers/guest-components/releases/tag/v0.20.0
- ›https://github.com/confidential-containers/guest-components/security/advisories/GHSA-84rc-2q4r-45pc
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