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7.5 High

CVE-2026-73553 Envoy is an open source edge and service proxy designed for cloud-native applications

Description

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, When ignore_path_parameters_in_path_matching is enabled, Envoy's router strips the semicolon suffix before matching but the RBAC url_path matcher evaluates the raw path. A downstream request such as /admin;x can therefore miss a DENY rule for /admin while the router still selects the protected /admin backend. The inconsistent canonicalization allows an unauthenticated client to bypass path-based authorization. The relevant scope boundary is that the route option and a path-based RBAC rule must both be present, and the protected route must match after stripping. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.

Affected products and versions

Product Affected versions Fixed in
envoy 1.39 1.39.0 → < 1.39.1 1.39.1
envoy 1.38 1.38.0 → < 1.38.4 1.38.4
envoy 1.37 1.37.0 → < 1.37.6 1.37.6
envoy 1.36 earliest → < 1.36.10 1.36.10

References

Timeline

  1. Published
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Other CVEs of envoy

The 98 CVEs of envoy →
CVE-2026-73511 Envoy is an open source edge and service proxy designed for cloud-native applications 5.3 Medium CVE-2026-73551 Envoy is an open source edge and service proxy designed for cloud-native applications 5.3 Medium CVE-2026-73546 Envoy is an open source edge and service proxy designed for cloud-native applications 7.4 High CVE-2026-73512 Envoy is an open source edge and service proxy designed for cloud-native applications 7.5 High
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