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CVE-2026-53713 is an authentication bypass and path traversal vulnerability in Envoy Gateway's EnvoyExtensionPolicy Lua handling. Improper input validation in the logic intended to protect critical file-access paths allows an attacker who can submit Lua code through an EnvoyExtensionPolicy to evade traversal protections by using redundant path separators. By bypassing these checks, the attacker can cause the gateway controller pod to read arbitrary files from its filesystem, including sensitive operating system files, Kubernetes service account material, TLS certificates, and process environment data. The issue stems from insufficient normalization and validation of path input before enforcing traversal restrictions.
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No public exploit code observed for this vulnerability.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.