# CVE-2026-1386: Arbitrary Host File Overwrite via Symlink in Firecracker Jailer

> CVE-2026-1386: Arbitrary Host File Overwrite via Symlink in Firecracker Jailer. CVSS 6.0 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-1386
Last updated: 2026-06-17T10:15:41Z

- Published: 2026-01-23 20:25 UTC · Updated: 2026-06-17 10:15 UTC · Assigner: AMZN
- CVSS: 6.0 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
- EPSS: 0.21%, 12th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-61

## 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 vendors and products

- AWS: Firecracker

## Tracked companies

- [Amazon Web Services](https://rewindex.com/company/aws.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-1386)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-1386)
- [https://aws.amazon.com/security/security-bulletins/2026-003-AWS/](https://aws.amazon.com/security/security-bulletins/2026-003-AWS/)
- [https://github.com/firecracker-microvm/firecracker/releases/tag/v1.13.2](https://github.com/firecracker-microvm/firecracker/releases/tag/v1.13.2)
- [https://github.com/firecracker-microvm/firecracker/releases/tag/v1.14.1](https://github.com/firecracker-microvm/firecracker/releases/tag/v1.14.1)
- [https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-36j2-f825-qvgc](https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-36j2-f825-qvgc)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-1386 · Markdown: https://rewindex.com/cve/CVE-2026-1386.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-1386 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:09:45.216Z