CVE-2026-1386

Arbitrary Host File Overwrite via Symlink in Firecracker Jailer

MEDIUM
6
CVSS Score
Published: January 23, 2026 at 08:25 PM UTC
Updated: June 17, 2026 at 10:15 AM UTC
1 product affected across 1 vendorFirecracker

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Severity
MEDIUM6
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6MEDIUMAMZN
Vector?

Quick Info

StatusANALYZED
CWE
CWE-61

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