Unrated severityOSV Advisory· Published Jan 23, 2026· Updated Jan 23, 2026
Arbitrary Host File Overwrite via Symlink in Firecracker Jailer
CVE-2026-1386
Description
A UNIX symbolic link following issue in the jailer component in Firecracker version v1.13.1 and earlier and 1.14.0 on Linux may allow a local host user with write access to the pre-created jailer directories to overwrite arbitrary host files via a symlink attack during the initialization copy at jailer startup, if the jailer is executed with root privileges.
To mitigate this issue, users should upgrade to version v1.13.2 or 1.14.1 or above.
Affected products
1- Range: v0.1.0, v0.1.1, v0.10.0, …
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
4- github.com/firecracker-microvm/firecracker/releases/tag/v1.13.2mitrepatch
- github.com/firecracker-microvm/firecracker/releases/tag/v1.14.1mitrepatch
- aws.amazon.com/security/security-bulletins/2026-003-AWS/mitrevendor-advisory
- github.com/firecracker-microvm/firecracker/security/advisories/GHSA-36j2-f825-qvgcmitrethird-party-advisory
News mentions
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