{"answers":{"affected":"5 open source packages ship an affected version, including github.com/lxc/incus/v6/cmd/incusd, github.com/lxc/incus and github.com/lxc/incus/v6. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40243 exists.","fix":"Upgrade github.com/lxc/incus/v6/cmd/incusd to 7.0.0 or later.","what":"CVE-2026-40243 is a low-severity vulnerability in lxc incus, published on 6 May 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-40243 and fix it if it is affected.\n\nWhat it is: CVE-2026-40243 is a low-severity vulnerability in lxc incus, published on 6 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40243 exists.\n\nAffected packages and fixed versions:\n- github.com/lxc/incus/v6/cmd/incusd (Go): affected all versions; fixed in 7.0.0\n- github.com/lxc/incus/v6/cmd/incusd (Go): affected all versions; fixed in 7.0.0\n- github.com/lxc/incus (Go): affected all versions; no fix listed\n- github.com/lxc/incus/v6 (Go): affected all versions; no fix listed\n- github.com/lxc/incus/v7 (Go): affected all versions; fixed in 7.0.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-40243/ (Markdown: https://insights.sbomify.com/CVE-2026-40243/index.md)","id":"CVE-2026-40243","markdown":"https://insights.sbomify.com/CVE-2026-40243/index.md","name":"CVE-2026-40243","record":{"aliases":["DEBIAN-CVE-2026-40243","GHSA-c839-4qxr-j4x3","GO-2026-5319","UBUNTU-CVE-2026-40243"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass","data_read"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Incus container manager","requires_auth":"none","summary":"Attackers can impersonate OVN database endpoints by bypassing TLS verification, allowing interception of management traffic in OVN-enabled deployments.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"incus","vendor":"linuxcontainers"}],"cvss":{"score":2.3,"severity":"low","source":"cna","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","version":"4.0"},"cwes":[{"id":"CWE-295","name":"Improper Certificate Validation"}],"description":"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.\n\nIn 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.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Incus OVN TLS verification accepts peer-supplied roots and permits endpoint impersonation","id":"CVE-2026-40243","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":5,"n_references":5,"next":{"headline":"OpenEXR has integer overflow in DWA setupChannelData planarUncRle pointer arithmetic (missed variant of CVE-2026-34589)","id":"CVE-2026-40244"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/lxc/incus","purl":"pkg:golang/github.com/lxc/incus","source":"GO-2026-5319"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/lxc/incus/v6","purl":"pkg:golang/github.com/lxc/incus/v6","source":"GO-2026-5319"},{"ecosystem":"Go","fixed":["7.0.0"],"introduced":["0"],"last_affected":[],"package":"github.com/lxc/incus/v6/cmd/incusd","purl":null,"source":"GHSA-c839-4qxr-j4x3"},{"ecosystem":"Go","fixed":["7.0.0"],"introduced":["0"],"last_affected":[],"package":"github.com/lxc/incus/v6/cmd/incusd","purl":"pkg:golang/github.com/lxc/incus/v6/cmd/incusd","source":"GHSA-c839-4qxr-j4x3"},{"ecosystem":"Go","fixed":["7.0.0"],"introduced":["0"],"last_affected":[],"package":"github.com/lxc/incus/v7","purl":"pkg:golang/github.com/lxc/incus/v7","source":"GO-2026-5319"}],"prev":{"headline":"Arcane Unauthenticated SSRF with Conditional Response Reflection in Template Fetch Endpoint","id":"CVE-2026-40242"},"products":["incus"],"published":"2026-05-06","related":[{"cvss_score":10,"headline":"Incus vulnerable to arbitrary file read and write through pongo templates","id":"CVE-2026-33897","kev_date_added":null,"published":"2026-03-26"},{"cvss_score":10,"headline":"Abitrary file write through systemd-creds option","id":"CVE-2026-33945","kev_date_added":null,"published":"2026-03-26"},{"cvss_score":8.8,"headline":"Local Incus UI web server vulnerable to nuthentication bypass","id":"CVE-2026-33898","kev_date_added":null,"published":"2026-03-26"},{"cvss_score":8.7,"headline":"Incus container environment configuration newline injection","id":"CVE-2026-23953","kev_date_added":null,"published":"2026-01-22"},{"cvss_score":8.7,"headline":"Incus container image templating arbitrary host file read and write","id":"CVE-2026-23954","kev_date_added":null,"published":"2026-01-22"},{"cvss_score":8.6,"headline":"Incus vulnerable to local privilege escalation through custom storage volumes","id":"CVE-2025-64507","kev_date_added":null,"published":"2025-11-10"},{"cvss_score":7.1,"headline":"Incus nil-pointer dereference in storage bucket import allows denial of service","id":"CVE-2026-40195","kev_date_added":null,"published":"2026-05-06"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-07","vendors":["lxc"]},"summary":"Attackers can impersonate OVN database endpoints by bypassing TLS verification, allowing interception of management traffic in OVN-enabled deployments.","url":"https://insights.sbomify.com/CVE-2026-40243/"}