CVE-2026-41648 MEDIUM

CVE-2026-41648: Incus: Unbounded YAML Metadata Decode via Parsing

Vendor Lxc
Product incus
Weakness CWE-770 · Uncontrolled resource consumption
Published May 7, 2026
Last update May 7, 2026

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

What the vulnerability does

01Description

Incus is a system container and virtual machine manager. Prior to version 7.0.0, user provided image and backup tarballs would be unpacked and YAML files parsed without any size restrictions. This was making it easy for an authenticated user to provide a crafted image or backup tarball that when parsed by Incus would lead to a very large YAML document being loaded into memory, potentially causing the entire server to run out of memory. This issue has been patched in version 7.0.0.

Key dates

02Disclosure timeline

May 7, 2026 CVE published
May 7, 2026 Record updated