{"id":"CVE-2026-121819","title":"A vulnerability has been identified in armeria-xds versions 1.40.0 through 1.42.0, where DataSourcePolicy checks filename containment without resolving symbolic links, allowing a compromised or semi-trusted xDS control plane to cause the…","summary":"A vulnerability has been identified in armeria-xds versions 1.40.0 through 1.42.0, where DataSourcePolicy checks filename containment without resolving symbolic links, allowing a compromised or semi-trusted xDS control plane to cause the…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-59"],"vendor":"LY Corporation","product":"Armeria","affected":["Armeria >= 1.40 < 1.43.0"],"published":"2026-11-06","updated":"2026-11-06","sourceUpdated":"2026-11-06T07:46:45.370Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-121819","references":[{"url":"https://line.github.io/security-advisory-blog/CVE-2026-121819/"},{"url":"https://github.com/line/armeria/security/advisories/GHSA-m64h-m6r5-6jrx"}],"tags":["cve.org"],"ingestedAt":"2026-11-06T08:48:01.717Z","epss":0.00325,"epssPercentile":0.25726,"slug":"CVE-2026-121819","body":"## Overview\n\nA vulnerability has been identified in armeria-xds versions 1.40.0 through 1.42.0, where DataSourcePolicy checks filename containment without resolving symbolic links, allowing a compromised or semi-trusted xDS control plane to cause the xDS client to read files outside configured allowed root directories when a symbolic link inside an allowed directory points outside it. In deployments using a credential injector, header-compatible text secrets may be exposed to an attacker-observable upstream.\n\n## Affected\n\n- `Armeria >= 1.40 < 1.43.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":33,"depthScoreParts":{"impact":32.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}