CVE-2026-121819

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 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.

• https://github.com/line/armeria/security/advisories/GHSA-m64h-m6r5-6jrx

• https://github.com/line/armeria/security/advisories/GHSA-m64h-m6r5-6jrx
• https://line.github.io/security-advisory-blog/CVE-2026-121819/