CVE-2026-53713 Envoy Gateway - Path Traversal

Envoy Gateway < 1.7.4 and < 1.8.1 contains a file system read caused by improper path normalization in to_absolute_normalized_path in internal/gatewayapi/luavalidator/security.lua, letting attackers read arbitrary files from the gateway controller pod, exploit requires submission of Lua code through EnvoyExtensionPolicy.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.43% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Path Traversal
Impact
File System Read, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
Published
14 September 2026
Updated
15 October 2026
Weakness
CWE-20

Vendor fix

Update to versions 1.7.4 and 1.8.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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