CVE-2026-40243

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.17% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 6.6% of scored records. A rank, not a probability.

NVD base score

2.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. NVD last modified this record on 2026-10-26.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-05-06 20:38Z5 MO AGO

Last updated

2026-05-07 14:03Z5 MO AGO

Reserved

2026-04-10

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Low (CVSS 2.3)

CNA CVSS vector

CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Weaknesses

• CWE-295Improper Certificate ValidationBase

Data version

5.2

Document digest

94e2c932662038ebe4b403c86e3b67cbb6c4ada3945629808bee97f39d8a3737

• github.comhttps://github.com/lxc/incus/security/advisories/GHSA-c839-4qxr-j4x3x_refsource_CONFIRM
• github.comhttps://github.com/lxc/incus/blob/v6.22.0/internal/server/network/ovn/ovn_icnb.gox_refsource_MISC
• github.comhttps://github.com/lxc/incus/blob/v6.22.0/internal/server/network/ovn/ovn_icsb.gox_refsource_MISC
• github.comhttps://github.com/lxc/incus/blob/v6.22.0/internal/server/network/ovn/ovn_nb.gox_refsource_MISC
• github.comhttps://github.com/lxc/incus/blob/v6.22.0/internal/server/network/ovn/ovn_sb.gox_refsource_MISC