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CVE-2026-73552 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 HTTP RBAC accepts RFC-valid opaque header bytes but evaluates safe_regex values with RE2's UTF-8 subject semantics. A downstream client can preserve a prohibited marker and add an unrelated obs-text octet, causing RE2::FullMatch to return false and a negative RBAC policy to treat the invalid subject as an ordinary no-match. A byte-oriented route matcher can still observe the marker, allowing the request to reach a route intended to be denied. The relevant scope boundary is that plain positive ALLOW regexes normally fail closed, and exact, prefix, suffix, and contains matchers are not shown to have this subject-domain failure. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.

Produits et versions touchés

Produit Versions touchées Corrigé en
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 premières → < 1.36.10 1.36.10

Références

Chronologie

  1. Publiée
  2. Dernière modification

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CVE-2026-73511 Envoy is an open source edge and service proxy designed for cloud-native applications 5.3 Moyenne CVE-2026-73553 Envoy is an open source edge and service proxy designed for cloud-native applications 7.5 Élevée CVE-2026-73551 Envoy is an open source edge and service proxy designed for cloud-native applications 5.3 Moyenne CVE-2026-73546 Envoy is an open source edge and service proxy designed for cloud-native applications 7.4 Élevée
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