CVE-2026-41648

Incus: Unbounded YAML Metadata Decode via Parsing

Published May 7, 2026 CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-6244-1 incus security update
Debian DSA Debian DSA DSA-6247-1 lxd security update
Github GHSA Github GHSA GHSA-67wx-r9xr-x75x Incus has Unbounded YAML Metadata Decode via Parsing
History
Type Values Removed Values Added
First Time appeared Linuxcontainers
Linuxcontainers incus
CPEs cpe:2.3:a:linuxcontainers:incus:*:*:*:*:*:*:*:*
Vendors & Products Linuxcontainers
Linuxcontainers incus
Metrics cvssV3_1

{'score': 5.0, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Lxc
Lxc incus
Vendors & Products Lxc
Lxc incus
Type Values Removed Values Added
Description 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.
Title Incus: Unbounded YAML Metadata Decode via Parsing
Weaknesses CWE-770
References
Metrics cvssV4_0

{'score': 5.3, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 7, 2026, 3:11 PM
Reserved
Apr 21, 2026, 11:58 PM
Status
Analyzed
Published
May 7, 2026, 2:16 PM
Modified
Oct 26, 2026, 10:10 PM