CVE-2026-1386

medium

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.

References

https://aws.amazon.com/security/security-bulletins/2026-003-AWS/

https://aws.amazon.com/security/security-bulletins/rss/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

Details

Source: Mitre, NVD

Published: 2026-01-23

Updated: 2026-01-23

Risk Information

CVSS v2

Base Score: 5.9

Vector: CVSS2#AV:L/AC:L/Au:M/C:N/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 6

Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

Severity: Medium

CVSS v4

Base Score: 6

Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H

Severity: Medium