UNIX symbolic link following in containerd - CVE-2026-53489
Published: June 19, 2026
Vulnerability identifier: #VU134888
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-53489
CWE-ID: CWE-61
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: containerd
Affected software:
containerd
containerd
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information from the host.
The vulnerability exists due to symlink following in the CRI plugin checkpoint restore handling of container.log when restoring a checkpoint image. A remote attacker can supply a crafted checkpoint image containing a symlinked path to disclose sensitive information from the host.
The issue can expose host files via kubectl logs.
How to mitigate CVE-2026-53489
Install security update from vendor's website.