CVE-2026-53713

critical

Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway.

Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. Prior to 1.7.4 and 1.8.1, to_absolute_normalized_path in internal/gatewayapi/luavalidator/security.lua does not collapse redundant separators before is_critical_path evaluates Lua submitted through EnvoyExtensionPolicy during default Strict validation. Linux resolves a double-slash absolute path as the corresponding single-slash path, but the validator does not match the redundant-separator form, allowing submitted Lua to read arbitrary files from the gateway controller pod. Exposed files can include Kubernetes service-account tokens, TLS certificates, and process environment data, and the disclosed credentials can provide access to sensitive Kubernetes API Server or Gateway xDS server information. This issue is fixed in versions 1.7.4 and 1.8.1.

CVSS

9.1

9.1 (CVSS v3.1)

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L

Severity source: NVD CVSS v3.1 (security-advisories@github.com)

Timeline (UTC)

Published: 2026-09-14 21:17

Modified: 2026-09-30 17:43

NVD status: Awaiting Analysis

Last synced 1 day ago

Verified against the source API 2026-10-27 06:53 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

Not reported by the source (unknown — not "none").

Weakness classification (CWE)

CWE-20

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

No vendor advisory or patch reference tagged by NVD. Check the references below.

References

https://github.com/envoyproxy/gateway/commit/5a78db82b7cf4fc5bebbeda2c50952892038a464 security-advisories@github.com
https://github.com/envoyproxy/gateway/commit/96e2b750868a459ace4b8b68e6a6e4fb0152b9b7 security-advisories@github.com
https://github.com/envoyproxy/gateway/commit/b4737180c7e597490c6363075c565fa8cf24eead security-advisories@github.com
https://github.com/envoyproxy/gateway/pull/9171 security-advisories@github.com
https://github.com/envoyproxy/gateway/pull/9172 security-advisories@github.com
https://github.com/envoyproxy/gateway/pull/9173 security-advisories@github.com
https://github.com/envoyproxy/gateway/releases/tag/v1.7.4 security-advisories@github.com
https://github.com/envoyproxy/gateway/releases/tag/v1.8.1 security-advisories@github.com
https://github.com/envoyproxy/gateway/security/advisories/GHSA-wcrf-9vrr-854f security-advisories@github.com

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 06:53 UTC · record ↗

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