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Vulnerabilities

Vulnerability · CVE-2026-33898

Incus is a system container and virtual machine manager.

Published Mar 27, 2026 · catalog updated Jun 17, 2026 · Incus is a system

Check if you run it

No confirmed exploitation is on record for CVE-2026-33898. EPSS is 0.48%. Act only if a listed version of Incus is a system is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Incus is a system).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.48%
Remediation
Advisory link
Affected products
cpe 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe linuxcontainers/incusversion unspecified

How to fix CVE-2026-33898

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-33898. EPSS is 0.48%. Act only if a listed version of Incus is a system is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-287: Improper Authentication. EPSS 0.48%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. 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

  2. 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

Sources

  • CVE.orgVulnerability recordCVE-2026-33898

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-33898

    30-day exploitation probability 0.5%

    first.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

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.