Skip to content
fr Sign in
5.3 Medium

CVE-2026-73551 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, Envoy's URL normalization does not recognize dot and dotdot path segments when they carry semicolon parameters. A request such as /user/..;foo=bar/admin is therefore not canonicalized to /admin even when path normalization is enabled. If an upstream interprets the segment according to RFC 3986 while Envoy applies routing or RBAC to the uncollapsed path, a remote client can cause path confusion and bypass path-based security policy. The relevant scope boundary is that the security consequence depends on a downstream/upstream path interpretation mismatch or a path-based Envoy decision. 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
  2. Last modified

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-2026-73553 Envoy is an open source edge and service proxy designed for cloud-native applications 7.5 High 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
Track this CVE