Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-73546— Envoy: Stored XSS in Admin Stats Interface (/stats?format=html)

Quick assessment

Affected
envoyproxy envoy
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 nam

CVSS 7.4 · High EPSS 0.60% · P47

Affected Version Matrix 4

VendorProduct Version RangeStatus
envoyproxy envoy < 1.36.10 affected
>= 1.37.0, < 1.37.6 affected
>= 1.38.0, < 1.38.4 affected
>= 1.39.0, < 1.39.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-73546

Vulnerability Information

Shenlong is analyzing...

Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Envoy: Stored XSS in Admin Stats Interface (/stats?format=html)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
envoyproxy envoy < 1.36.10 -

II. Public POCs for CVE-2026-73546

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-73546

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-73546 (4)

Other References for CVE-2026-73546 (5)

Same Patch Batch · envoyproxy · 2026-09-21 · 13 CVEs total

CVE-2026-73550 7.5 HIGH Envoy: HTTP/2 Discarded Host Header 200 GB Header-Copy OOM in Envoy
CVE-2026-73512 7.5 HIGH Envoy: use-after-free in QUIC on internal redirects
CVE-2026-73553 7.5 HIGH Envoy: RBAC Authorization Bypass via Path Parameters
CVE-2026-73513 7.5 HIGH Envoy: oghttp2 upstream trailers incorrect handling
CVE-2026-73548 7.5 HIGH Envoy: Cross-user response poisoning via a generic (non-WebSocket) HTTP upgrade on Envoy's
CVE-2026-73547 7.5 HIGH Envoy ext_authz: request `:path` pseudoheader dereferenced w/o null check
CVE-2026-73552 7.5 HIGH Envoy: HTTP RBAC safe_regex can fail open on RFC-valid obs-text header values
CVE-2026-48521 5.9 MEDIUM Envoy: HTTP/3 connection pool selection null-derefs in ProdClusterManagerFactory::allocate
CVE-2026-50572 5.9 MEDIUM Envoy: ext_authz - RawHttpClientImpl onSuccess 0x0 segfault
CVE-2026-73511 5.3 MEDIUM Envoy: Potential path-matching/authentication bypass when using Envoy in combination with
CVE-2026-73549 5.3 MEDIUM Envoy - Incomplete fix for CVE-2026-26310: copyInternetAddressAndPort crashes on scoped IP
CVE-2026-73551 5.3 MEDIUM Envoy: Path normalization does not handle dot and dotdot segments with parameters

IV. Related Vulnerabilities

Same product: envoy
Same vendor: envoyproxy
Same weakness: CWE-79

V. Comments for CVE-2026-73546

No comments yet

Leave a comment