6.0Medium
CVE-2026-1386Arbitrary Host File Overwrite via Symlink in Firecracker Jailer
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.
Weakness (CWE):
CWE-61
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| amazon | firecracker | < 1.13.2 | |
| AWS | Firecracker | fixed 1.13.2, fixed 1.14.1 |
References and patches
- https://aws.amazon.com/security/security-bulletins/2026-003-AWS/ vendor-advisoryVendor Advisory
- https://github.com/firecracker-microvm/firecracker/releases/tag/v1.14.1 patchProductRelease Notes
- https://github.com/firecracker-microvm/firecracker/releases/tag/v1.13.2 patchProductRelease Notes
- https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-36j2-f825-qvgc third-party-advisoryVendor Advisory
CPE matches (NVD) (3)
cpe:2.3:a:amazon:firecracker:*:*:*:*:*:*:*:*< 1.13.2cpe:2.3:a:amazon:firecracker:1.14.0:-:*:*:*:*:*:*cpe:2.3:a:amazon:firecracker:1.14.0:dev:*:*:*:*:*:*