CVE-2026-53713Network attack vectorHinoki check available

Secret disclosure via redundant path separators

Published Sep 14, 2026 · Updated Sep 14, 2026

Path validation bypass in Envoy Gateway before 1.7.4 and 1.8.0-rc.0 through 1.8.0 allows remote authenticated users to read controller files. The to_absolute_normalized_path function leaves redundant separators intact, so is_critical_path misses double-slash paths that Linux resolves normally. Submitting Lua through EnvoyExtensionPolicy under default Strict validation is required, and exposed files include service-account tokens, TLS certificates, and process environment data.

CVSS severity9.1
Critical
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Path validation bypass in Envoy Gateway before 1.7.4 and 1.8.0-rc.0 through 1.8.0 allows remote authenticated users to read controller files. The to_absolute_normalized_path function leaves redundant separators intact, so is_critical_path misses double-slash paths that Linux resolves normally. Submitting Lua through EnvoyExtensionPolicy under default Strict validation is required, and exposed files include service-account tokens, TLS certificates, and process environment data.

The record

CVE
CVE-2026-53713
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Envoy Proxy
Product
Envoy Gateway
Classifications
CWE-20, T1552.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.7.4
  2. Affected versionversion=>= 1.8.0-rc.0, < 1.8.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Envoy Proxy · Envoy Gatewayversion=< 1.7.4; version=>= 1.8.0-rc.0, < 1.8.1

Published CVSS scores

9.1GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1552.001Unsecured Credentials: Credentials In Files

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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