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Cross-site Scripting (XSS) Affecting kuma-envoy-fips-1.38 package, versions <1.38.4-r0

Severity

 Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.62% (48th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-KUMAENVOYFIPS138-20268496
  • published30 Sept 2026
  • disclosed21 Sept 2026
Report a new vulnerability Found a mistake?

Introduced: 21 Sep 2026

NewCVE-2026-73546  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade Minimos:latest kuma-envoy-fips-1.38 to version 1.38.4-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kuma-envoy-fips-1.38 package and not the kuma-envoy-fips-1.38 package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

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.