Medium severity · published May 7, 2026
CVE-2026-41648
Incus: Unbounded YAML Metadata Decode via Parsing
5.0
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IN
incus · lxc
< 7.0.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41648
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-41648
Patch
https://github.com/lxc/incus/releases/tag/v7.0.0
Exploit
https://github.com/lxc/incus/security/advisories/GHSA-67wx-r9xr-x75x
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