CVE-2026-1386

Name: CVE-2026-1386
Creator: NVD / NIST
Published: 2026-01-23T21:15:51.397+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6/10EPSS 0.19%

Last modified Jun 17, 2026

CVE-2026-1386 is a medium-severity vulnerability rated 6/10 on the CVSS scale. 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.. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6/10

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

CVSS 4.0

6/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.19%

9.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-61

Affected Software

Vendor	Product	Versions
Amazon	Firecracker	< 1.13.2
Amazon	Firecracker	1.14.0

References

https://aws.amazon.com/security/security-bulletins/2026-003-AWS/Vendor Advisory
https://github.com/firecracker-microvm/firecracker/releases/tag/v1.13.2Product, Release Notes
https://github.com/firecracker-microvm/firecracker/releases/tag/v1.14.1Product, Release Notes
https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-36j2-f825-qvgcVendor Advisory

Timeline

Published: Jan 23, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-1386?

How severe is CVE-2026-1386?

CVE-2026-1386 has a CVSS score of 6/10 (MEDIUM severity). The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.

How do I fix CVE-2026-1386?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-1386?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST