CVE-2026-1386

Arbitrary Host File Overwrite via Symlink in Firecracker Jailer

CVSS 6 MEDIUMEPSS 0.2%CWE-61

Vexday Risk Score

13Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 6EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Ciclo de vida

23 ene 2026Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

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.

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

Productos afectados

AWS · Firecracker

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Referencias

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/v1.14.1 https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-36j2-f825-qvgc