lxc incus up to 6.22.x certificate validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.0$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in lxc incus up to 6.22.x. This issue affects some unknown processing. The manipulation results in certificate validation. This vulnerability was named CVE-2026-33542. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in lxc incus up to 6.22.x. Affected is an unknown function. The manipulation with an unknown input leads to a certificate validation vulnerability. CWE is classifying the issue as CWE-295. The product does not validate, or incorrectly validates, a certificate. This is going to have an impact on integrity. CVE summarizes:

Incus is a system container and virtual machine manager. Prior to version 6.23.0, a lack of validation of the image fingerprint when downloading from simplestreams image servers opens the door to image cache poisoning and under very narrow circumstances exposes other tenants to running attacker controlled images rather than the expected one. Version 6.23.0 patches the issue.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-33542 since 03/20/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1587.003.

The vulnerability scanner Nessus provides a plugin with the ID 304243 (Debian dsa-6184 : golang-github-lxc-incus-dev - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.23.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (304243). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 3.0

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 304243
Nessus Name: Debian dsa-6184 : golang-github-lxc-incus-dev - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: incus 6.23.0

Timelineinfo

03/20/2026 CVE reserved
03/27/2026 +7 days Advisory disclosed
03/27/2026 +0 days VulDB entry created
03/30/2026 +2 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-p8mm-23gg-jc9r
Status: Confirmed

CVE: CVE-2026-33542 (🔒)
GCVE (CVE): GCVE-0-2026-33542
GCVE (VulDB): GCVE-100-353808

Entryinfo

Created: 03/27/2026 07:07
Updated: 03/30/2026 00:34
Changes: 03/27/2026 07:07 (67), 03/30/2026 00:34 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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