{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","favicon":"https://feed.craftedsignal.io/favicon-32x32.png","feed_url":"https://feed.craftedsignal.io/tags/v4-10.0-cvss/feed.json","home_page_url":"https://feed.craftedsignal.io/","icon":"https://feed.craftedsignal.io/apple-touch-icon.png","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"id":"CVE-2026-112816"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["LXD (\u003c 4.0.15/5.0.11/5.21.9/6.10.1)","MicroCloud (\u003c 2.1.5/3.4.1)"],"_cs_severities":["critical"],"_cs_tags":["authentication-bypass","v4-10.0-cvss","lxd","microcloud","vulnerability"],"_cs_type":"advisory","_cs_vendors":["Canonical"],"content_html":"\u003cp\u003eCVE-2026-112816 is a critical vulnerability in the Canonical LXD HTTPS interface caused by improper validation of client TLS certificate chains. An attacker with network access to the LXD API can craft a certificate chain that mimics a trusted client, effectively bypassing authentication. This vulnerability impacts both LXD and MicroCloud environments. Canonical has released patches for multiple stable release tracks as of October 29, 2026.\u003c/p\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation allows an unauthenticated attacker to gain control over the LXD/MicroCloud cluster, managed containers, virtual machines, and the underlying host system.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAudit all systems running Canonical LXD or MicroCloud to identify versions currently below the minimum safe thresholds: LXD (4.0.15, 5.0.11, 5.21.9, 6.10.1) and MicroCloud (2.1.5, 3.4.1).\u003c/li\u003e\n\u003cli\u003ePlan a maintenance window for patching, as \u003ccode\u003esnap refresh\u003c/code\u003e operations may restart services and cause temporary disruption to container or VM workloads.\u003c/li\u003e\n\u003cli\u003eRestrict network access to the LXD HTTPS API to only authorized management subnets and trusted administrative clients using firewall or network security group policies.\u003c/li\u003e\n\u003cli\u003ePerform post-patching validation by verifying package versions and ensuring cluster service health.\u003c/li\u003e\n\u003cli\u003ePrior to patching, perform an investigation of LXD audit logs for signs of unauthorized API access or anomalous client certificate usage.\u003c/li\u003e\n\u003c/ol\u003e\n","date_modified":"2026-10-31T18:40:10Z","date_published":"2026-10-31T18:40:10Z","id":"https://feed.craftedsignal.io/briefs/2026-10-lxd-authentication-bypass/","summary":"An authentication bypass vulnerability (CVE-2026-112816) in the Canonical LXD HTTPS interface allows attackers to impersonate trusted clients via crafted TLS certificate chains, granting unauthorized control over clusters, containers, and host systems.","title":"Canonical LXD and MicroCloud: Authentication bypass (CVE-2026-112816)","url":"https://feed.craftedsignal.io/briefs/2026-10-lxd-authentication-bypass/"}],"language":"en","title":"CraftedSignal Threat Feed - V4-10.0-Cvss","version":"https://jsonfeed.org/version/1.1"}