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CVE-2026-1386

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Date: January 23, 2026

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.

Severity Score

Related Resources (6)

https://aws.amazon.com/security/security-bulletins/2026-003-AWS/
https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-36j2-f825-qvgc
https://github.com/firecracker-microvm/firecracker/releases/tag/v1.14.1
https://github.com/firecracker-microvm/firecracker/releases/tag/v1.13.2
https://nvd.nist.gov/vuln/detail/CVE-2026-1386
https://www.mend.io/vulnerability-database/CVE-2026-1386

Severity Score

Weakness Type (CWE)

UNIX Symbolic Link (Symlink) Following

CWE-61

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): HIGH
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): HIGH

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