CVE-2026-33542 | lxc incus up to 6.22.x certificate validation (GHSA-p8mm-23gg-jc9r)

VDB-353808 · CVE-2026-33542 · GHSA-P8MM-23GG-JC9R LXC INCUS UP TO 6.22.X CERTIFICATE VALIDATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 3.0 $0-$5k 3.02+ 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. Upgrading to version 6.23.0 eliminates this vulnerability. Productinfo Vendor lxc Name incus Version 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 6.10 6.11 6.12 6.13 6.14 6.15 6.16 6.17 6.18 6.19 6.20 6.21 6.22 Website Product: https://github.com/lxc/incus/ 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 Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock 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 Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock 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 03/27/2026 +0 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 Changes: 03/27/2026 07:07 (67) Complete: 🔍 Cache ID: 99:C36:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸