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CVE PROGRAM SOURCE RECORD7.4 High

CVE-2026-73546

Envoy: Stored XSS in Admin Stats Interface (/stats?format=html)

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Status
Published
Published
Updated
Assigning organization
GitHub_M

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 /stats?format=html admin endpoint uses StatsHtmlRender, which sanitizes string statistic values but emits statistic names without HTML encoding. A data-plane component such as grpc_stats with stats_for_all_methods enabled can incorporate attacker-controlled path segments into cached dynamic statistic names. When an operator views the HTML stats page, the stored name can execute script with the admin interface's origin and issue privileged same-origin requests. The relevant scope boundary is that the admin interface must be browser-accessible and an enabled component must persist attacker-influenced text in statistic names. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

envoyproxy envoy

  • < 1.36.10affected
  • >= 1.37.0, < 1.37.6affected
  • >= 1.38.0, < 1.38.4affected
  • >= 1.39.0, < 1.39.1affected

References