GO-2026-4882 CVE-2026-33542 GHSA-p8mm-23gg-jc9r
Incus does not verify combined fingerprint when downloading images from simplestreams servers in github.com/lxc/incus
- Severity
- 0.0 / 10
- Medium · CVSS 4.0
- Exploit chance (EPSS)
- 0.18%
- Chance of exploitation in the next 30 days. Higher than 7.89% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Fix
- Available
- 2 packages have a fixed version
Description
Incus does not verify combined fingerprint when downloading images from simplestreams servers 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/client | < 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/client Go → 6.23.0
- go
go get github.com/lxc/incus/v6/client@v6.23.0 && go mod tidy
Severity breakdown
CVSS 4.0 0.0
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:H/SI:L/SA:N
- Attack vector
- Network
- Attack complexity
- High
- Attack requirements
- Present
- Privileges required
- Low
- User interaction
- Passive
- Confidentiality (vulnerable system)
- Low
- Integrity (vulnerable system)
- High
- Availability (vulnerable system)
- None
- Confidentiality (subsequent systems)
- High
- Integrity (subsequent systems)
- Low
- Availability (subsequent systems)
- None
CVSS 3.1 4.8
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Weakness
CWE-295: Improper Certificate Validation
The product does not validate, or incorrectly validates, a certificate.
How to prevent it
- Architecture and Design, Implementation: Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
- Implementation: If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.
CWE-354: Improper Validation of Integrity Check Value
The product does not validate or incorrectly validates the integrity check values or "checksums" of a message. This may prevent it from detecting if the data has been modified or corrupted in transmission.
How to prevent it
- Implementation: Ensure that the checksums present in messages are properly checked in accordance with the protocol specification before they are parsed and used.
References
Advisories
Packages
Other links
- github.com/lxc/incus/security/advisories/GHSA-p8mm-23gg-jc9r
- github.com/lxc/incus/commit/04e97418189f743411884afb81a3384e6218b8cd
- github.com/lxc/incus/commit/4a80447c52d6bc05d3322feeb5395f581e7a80e4
- github.com/lxc/incus/commit/72688b7d9400c8f3c17ad0f93a7c1aeb89627307
- github.com/lxc/incus/commit/ee26f72524ab60a4abcfd4e52667c52bb24364fc
- github.com/lxc/incus/releases/tag/v6.23.0
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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