CVE-2026-33898
Incus is a system container and virtual machine manager.
Published Mar 27, 2026 · updated Jun 17, 2026 · linuxcontainers incus
Incus is a system container and virtual machine manager. Prior to version 6.23.0, the web server spawned by incorrectly validates the authentication token such that an invalid value will be accepted. runs a local web server on a random localhost port. For authentication, it provides the user with a URL containing an authentication token. When accessed with that token, Incus creates a cookie persisting that token without needing to include it in subsequent HTTP requests. While the Incus client correctly validates the value of the cookie, it does not correctly validate the token when passed int the URL. This allows for an attacker able to locate and talk to the temporary web server on localhost to have as much access to Incus as the user who ran . This can lead to privilege escalation by another local user or an access to the user's Incus instances and possibly system resources by a remote attack able to trick the local user into interacting with the Incus UI web server. Version 6.23.0 patches the issue.
Code
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Timeline
Detection, updates, and resolution for this record.
Mar 27, 2026 · NIST NVD
Detected
Incus is a system container and virtual machine manager. Prior to version 6.23.0, the web server spawned by incorrectly validates the authentication token such that an invalid value will be accepted. runs a local web server on a random localhost port. For authentication, it provides the user with a URL containing an authentication token. When accessed with that token, Incus creates a cookie persis
Jun 17, 2026 · NIST NVD
Updated
Incus is a system container and virtual machine manager. Prior to version 6.23.0, the web server spawned by incorrectly validates the authentication token such that an invalid value will be accepted. runs a local web server on a random localhost port. For authentication, it provides the user with a URL containing an authentication token. When accessed with that token, Incus creates a cookie persis
Affected
- cpe linuxcontainers/incusversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-33898
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-33898
Incus is a system container and virtual machine manager. Prior to version 6.23.0, the web server spawned by incorrectly validates the authentication token such that an invalid value will be accepted. runs a local web server on a random localhost port.
nvd.nist.gov