{"id":"CVE-2026-86836","details":"In Eclipse Ankaios versions 0.1.0 through 1.0.2, the agent creates workload files and Control Interface named pipes (FIFOs) under a predictable path derived from the agent name and a hash of the workload's runtime configuration. If a directory or FIFO already exists at that path when the agent (re)starts, the agent reuses it based only on an existence and/or file-type check, without validating its owner or permissions. A local, unprivileged user with write access to the same base directory (by default under `$TMPDIR/ankaios`, e.g. shared `/tmp`) can pre-create this path hierarchy, including the two Control Interface FIFOs, before the agent starts. The agent then treats the attacker-owned FIFOs as the legitimate Control Interface for the targeted workload. The attacker can complete the Control Interface handshake and issue requests using that workload's configured `controlInterfaceAccess` permissions, allowing impersonation of the workload and, depending on its configured permissions, unauthorized reading and/or modification of the cluster's desired state.","modified":"2026-09-18T03:30:46.539525028Z","published":"2026-09-14T17:44:56.384Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86836.json","cna_assigner":"eclipse","cwe_ids":["CWE-276","CWE-367","CWE-379"]},"references":[{"type":"WEB","url":"https://github.com/eclipse-ankaios/ankaios/releases/tag/v1.0.3"},{"type":"WEB","url":"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/280"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86836.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86836"},{"type":"FIX","url":"https://github.com/eclipse-ankaios/ankaios/pull/799"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/eclipse-ankaios/ankaios","events":[{"introduced":"ed041ca21de7863e0e22a09276fccce1fc3d17b5"},{"fixed":"5cc6dda28d7669e5d282bfed8891ef40fb3c8fdd"},{"fixed":"3f7ab7f148e814c57cb7de1e2bb11b9a05b7814b"}],"database_specific":{"source":["DESCRIPTION","REFERENCES"],"extracted_events":[{"introduced":"0.1.0"},{"fixed":"1.0.2"}]}}],"versions":["v1.0.2","v1.0.0","v1.0.0-rc1","v0.7.0","v0.7.0-rc1","v0.6.0","v0.6.0-rc1","v0.5.0","v0.5.0-rc1","v0.4.0","v0.4.0-rc1","v0.3.1","v0.3.1-pre","v0.3.0","v0.2.0","v0.2.0-rc1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86836.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:H"}]}