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6.0 Medium

CVE-2026-1386 A UNIX symbolic link following issue in the jailer component in Firecracker version v1.13.1 and earlier and 1.14.0 on…

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 products and versions

Product Affected versions Fixed in
Firecracker 1.14 earliest → < 1.14.1 1.14.1
Firecracker 1.13 earliest → < 1.13.2 1.13.2

Other CVEs of Firecracker

The 3 CVEs of Firecracker →
CVE-2026-122192 Guest access to Firecracker process memory after a failed memory discard 7.5 High CVE-2026-5747 An out-of-bounds write issue in the virtio PCI transport in Firecracker 1.13.0 through 1.14.3 and 1.15.0 on x86_64 and… 7.5 High
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