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CVE-2026-1386
6.0 MEDIUM
- CVSS version: 3.1
- Attack vector (AV): LOCAL
- Attack complexity (AC): LOW
- Privileges required (PR): HIGH
- User interaction (UI): NONE
- Scope (S): UNCHANGED
- Confidentiality impact (C): NONE
- Integrity impact (I): HIGH
- Availability impact (A): HIGH
Arbitrary Host File Overwrite via Symlink in Firecracker Jailer
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.
References
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https://aws.amazon.com/security/security-bulletins/2026-003-AWS/ vendor-advisory
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https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-36j… third-party-advisory
Affected products
Firecracker
- ==1.14.1
- ==1.13.2
Package maintainers
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@thoughtpolice Austin Seipp <aseipp@pobox.com>
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@qjoly Quentin JOLY <github@une-pause-cafe.fr>
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@usertam Samuel Tam <code@usertam.dev>
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@techknowlogick techknowlogick <techknowlogick@gitea.com>