GO-2026-4879 CVE-2026-33898 GHSA-453r-g2pg-cxxq
Local Incus UI web server vulnerable to nuthentication bypass in github.com/lxc/incus
- Severity
- 8.8 / 10
- High · CVSS 3.1
- Exploit chance (EPSS)
- 0.35%
- Chance of exploitation in the next 30 days. Higher than 28.98% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-287 Improper Authentication
- Fix
- Available
- 2 packages have a fixed version
Description
Local Incus UI web server vulnerable to nuthentication bypass in github.com/lxc/incus
Affected versions
Go
| Package | Vulnerable | Fixed in |
|---|---|---|
| github.com/lxc/incus | all versions |
No fix yet |
| github.com/lxc/incus/v6 | < 6.23.0 |
6.23.0 |
| github.com/lxc/incus/v6/cmd/incus | < 6.23.0 |
6.23.0 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
github.com/lxc/incus/v6 Go → 6.23.0
- go
go get github.com/lxc/incus/v6@v6.23.0 && go mod tidy
github.com/lxc/incus/v6/cmd/incus Go → 6.23.0
- go
go get github.com/lxc/incus/v6/cmd/incus@v6.23.0 && go mod tidy
Severity breakdown
CVSS 3.1 8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Weakness
CWE-287: Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
How to prevent it
- Architecture and Design: Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
References
Advisories
Packages
Other links
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GO-2026-6319 Incus has a project restriction bypass in instance copy across projects | High | Also affects github.com/lxc/incus |
| GHSA-64f3-v33m-w89f Incus has a project restriction bypass for custom volume copy across projects | High | Also affects github.com/lxc/incus |
| GO-2026-5806 Incus has an arbitrary file write on its client due to trusted image hash | Critical | Also affects github.com/lxc/incus |
| GO-2026-5810 Incus: CreateCustomVolumeFromBackup nil-pointer dereference on volume_snapshots[*].expires_at (sibling-field variant of GHSA-r7w7) | Low | Also affects github.com/lxc/incus |
| GO-2026-5808 Incus has an argument injection in backup compression algorithm leading to AFW and ACE | Critical | Also affects github.com/lxc/incus |
| GO-2026-5800 Incus: Nil-pointer dereference in createDependentVolumesFromBackup on disk.{Volume,VolumeSnapshots,Pool} | Low | Also affects github.com/lxc/incus |
| GO-2026-5802 Incus has an arbitrary file write via path traversal in S3 multipart upload | Critical | Also affects github.com/lxc/incus |
| GO-2026-5803 Incus has arbitrary file read+write on host via templates/ symlink in malicious image | Critical | Also affects github.com/lxc/incus |
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