CVE-2026-40243Incus is a system container and virtual machine manager.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Incus is a system container and virtual machine manager. In versions before 7.0.0, broken TLS validation logic in the OVN database connection logic can allow connections to an attacker's OVN database. The OVN client implementations disable Go standard TLS server verification and replace it with custom peer-certificate verification logic. That replacement verifier does not anchor trust in the configured CA certificate. Instead, it constructs the verification root set from certificates supplied by the peer during the handshake, so the configured CA is parsed but not used as the trust anchor for the final verification decision. In OVN-enabled deployments that use these SSL database connection paths, an attacker able to impersonate or intercept the OVN endpoint on the management network can present a rogue self-signed certificate chain, and Incus will accept this certificate as valid. This issue defeats the intended CA-based trust model for OVN database connections and permits endpoint impersonation by an active attacker in a suitable network position. This issue is fixed in version 7.0.0.
- CVSS
- 4.8 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
- Weakness (CWE)
- CWE-295
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
linuxcontainers incus linuxcontainers:incus | before 7.0.0 | NVD |
References
- https://github.com/lxc/incus/blob/v6.22.0/internal/server/network/ovn/ovn_icnb.goproduct
- https://github.com/lxc/incus/blob/v6.22.0/internal/server/network/ovn/ovn_icsb.goproduct
- https://github.com/lxc/incus/blob/v6.22.0/internal/server/network/ovn/ovn_nb.goproduct
- https://github.com/lxc/incus/blob/v6.22.0/internal/server/network/ovn/ovn_sb.goproduct
- https://github.com/lxc/incus/security/advisories/GHSA-c839-4qxr-j4x3exploit, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.