CVE-2026-1386

Arbitrary Host File Overwrite via Symlink in Firecracker Jailer

CVSS 6 MEDIUMEPSS 0.2%CWE-61

Vexday Risk Score

13Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

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

Ciclo de vida

23 jan 2026Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

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

Produtos afetados

AWS · Firecracker

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Referências

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