What is CVE-2026-1386?

CVE-2026-1386 is a medium-severity vulnerability in Aws Firecracker, classified under UNIX Symbolic Link (Symlink) Following. CVSS score: 6.0/10. Published 2026-01-23.

How severe is CVE-2026-1386?

Medium severity. CVSS v3 base score is 6.0 out of 10.

Vulnerability in Aws Firecracker

CVE-2026-1386

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 fi…

EPSS: 0.000 (1.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H.

Affected products

Aws Firecracker — versions 1.13.2, 1.14.1

Weakness classification (CWE)

CWE-61 — UNIX Symbolic Link (Symlink) Following

References

aws.amazon.com/security/security-bulletins/2026-003-AWS/ (vendor-advisory)
github.com/firecracker-microvm/firecracker/releases/tag/v1.14.1 (patch)
github.com/firecracker-microvm/firecracker/releases/tag/v1.13.2 (patch)
github.com/firecracker-microvm/firecracker/security/advisories/GHSA-36j2-f825-q… (third-party-advisory)

Frequently asked questions

What is CVE-2026-1386?: CVE-2026-1386 is a medium-severity vulnerability in Aws Firecracker, classified under UNIX Symbolic Link (Symlink) Following. CVSS score: 6.0/10. Published 2026-01-23.
How severe is CVE-2026-1386?: Medium severity. CVSS v3 base score is 6.0 out of 10.