CVE-2026-33898: Incus is a system container and virtual machine manager

Q: How do I fix CVE-2026-33898?

incus: upgrade to 6.23.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-33898 being exploited?

CVE-2026-33898 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33898 affect?

CVE-2026-33898 affects incus. Severity is high (CVSS 8.8). Incus is a system container and virtual machine manager. Prior to version 6.23.0, the web server spawned by `incus webui` incorrectly validates the authentication token such that an invalid value will be accepted. `incus webui` runs a local

Q: How urgent is CVE-2026-33898?

Priority 43/100. High severity; On your watchlist

This month

HIGH 8.8WATCHLISTUPGRADE

CVE-2026-33898 is a high-severity flaw (CVSS 8.8) affecting incus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Incus is a system container and virtual machine manager. Prior to version 6.23.0, the web server spawned by `incus webui` incorrectly validates the authentication token such that an invalid value will be accepted. `incus webui` 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 withou

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 71%)
CISA exploited list	No
Weakness	CWE-287
Published	2026-03-27
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: linuxcontainers

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-27 00:16 UTCPublished CVE record published
2026-06-17 10:38 UTCUpdated Record last modified

linuxcontainers incus UPGRADE

Affected: < 6.23.0

Fixed in: 6.23.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy incus || rpm -q incus || incus --version

2. UPGRADE to 6.23.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade incus

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade incus

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33898?

incus: upgrade to 6.23.0. Exact commands for each OS are on this page.

Is CVE-2026-33898 being exploited?

CVE-2026-33898 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33898 affect?

CVE-2026-33898 affects incus. Severity is high (CVSS 8.8). Incus is a system container and virtual machine manager. Prior to version 6.23.0, the web server spawned by `incus webui` incorrectly validates the authentication token such that an invalid value will be accepted. `incus webui` runs a local

How urgent is CVE-2026-33898?

Priority 43/100. High severity; On your watchlist

Related CVEs

CVE-2026-41648 MEDIUM 5.0 UPGRADE Incus is a system container and virtual machine manager
CVE-2026-41647 MEDIUM 6.5 UPGRADE Incus is a system container and virtual machine manager
CVE-2026-41684 MEDIUM 6.5 UPGRADE Incus is a system container and virtual machine manager
CVE-2026-41685 MEDIUM 4.3 UPGRADE Incus is a system container and virtual machine manager
CVE-2026-40195 MEDIUM 6.5 UPGRADE Incus is a system container and virtual machine manager

References

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