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CVE-2026-73546

📛 CVE Title

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

⬇ Download JSON ⚠ View as Threat

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.

Overview

State
PUBLISHED
Assigner (CNA)
GitHub_M
CVSS severity
HIGH
CVSS score
CVSS 7.4 / 10 7.4 7.4 / 10
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Effective score
7.4 / 10 HIGH source: CNA overview
CWE(s)
CWE-79
Reserved
2026-08-12
Published
2026-09-21 19:53 UTC
Last updated
2026-09-21 20:07 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/73xxx/CVE-2026-73546.json
Linked Threat
CVE-2026-73546 — Envoy: Stored XSS in Admin Stats Interface (/stats?format=html)

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-09-21 20:17:28 UTC
NVD last modified
2026-09-21 21:17:09 UTC
NVD CVSS v3.1
CVSS 7.4 / 10 7.4 7.4 / 10 HIGH source: security-advisories@github.com
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Exploitability subscore
2.2 / 10
Impact subscore
5.2 / 10

NVD / KEV / EPSS data refreshed 2026-09-22 03:38 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2026-84114
Assigner
GitHub_M
Published
Sep 21, 2026, 7:53:21 PM
Updated
Sep 21, 2026, 8:07:34 PM
EUVD base score (CVSS 3.1)
7.4 / 10
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
EUVD-reported EPSS
0.0000
Vendors
envoyproxy
Products
envoy (1.39.0, < 1.39.1)
envoy (1.38.0, < 1.38.4)
envoy (1.37.0, < 1.37.6)
envoy (< 1.36.10)

ENISA 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.

EUVD references (9)

Affected products (1)
VendorProductVersionsPlatforms
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) —

Vendor references (9)

References embedded in the original CVE record by the assigning CNA.

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (10)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

  • July 2026 Critical Patch Update Released | security - Oracle Blogs
    web:blogs.oracle.com

    For more information about the Critical Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.

    2026-09-22 16:47 UTC
  • Security Update Guide - Microsoft
    web:msrc.microsoft.com

    The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

    2026-09-22 16:47 UTC
  • Cisco Identity Services Engine Authentication Bypass Vulnerability
    web:sec.cloudapps.cisco.com

    A vulnerability in an API of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to bypass authentication. This vulnerability is due to insufficient authentication control on an API endpoint. An attacker could exploit this vulnerability by sending a crafted request to an affected API endpoint. A successful exploit could allow the attacker to gain unauthorized ...

    2026-09-22 16:47 UTC
  • Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva
    web:senserva.com

    Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

    2026-09-22 16:47 UTC
  • SAP Security Patch Day - April 2026
    web:support.sap.com

    SAP security patch day bulletin This post shares the information on security notes that remediate vulnerabilities discovered in SAP products. SAP strongly recommends that the customer visits the support portal and applies patches on priority to protect their SAP landscape. On 14 th of April 2026 , SAP security patch day saw the release of 19 new security notes. There is 1 update to previously ...

    2026-09-22 16:47 UTC
  • SAP Security Patch Day - June 2026
    web:support.sap.com

    SAP security Patch Day Bulletin This post shares the information on security notes that remediate vulnerabilities discovered in SAP products. SAP strongly recommends that the customer visits the support portal and applies patches on priority to protect their SAP landscape. On 9th of June 2026 , SAP security patch day saw the release of 15 new security notes.

    2026-09-22 16:47 UTC
  • DSA-2026-359: Security Update for Dell OpenManage Enterprise ...
    web:www.dell.com

    Dell OpenManage Enterprise remediation is available for multiple security vulnerabilities that may be exploited by malicious users to compromise the affected system.

    2026-09-22 16:47 UTC
  • Oracle Critical Patch Update Advisory - July 2026
    web:www.oracle.com

    This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

    2026-09-22 16:47 UTC
  • Oracle Critical Security Patch Update Advisory - June 2026
    web:www.oracle.com

    Additional CVEs addressed are: The patch for CVE - 2026 -34481 also addresses CVE - 2026 -34477, CVE - 2026 -34478, CVE - 2026 -34479, and CVE - 2026 -34480. Oracle Fusion Middleware Risk Matrix This Critical Security Patch Update contains 106 new security patches for Oracle Fusion Middleware. 53 of these vulnerabilities may be remotely exploitable without authentication, i.e., may be exploited over a ...

    2026-09-22 16:47 UTC
  • CVE-2026-73546: envoyproxy envoy: Envoy is an open source edge ... - Rapid7
    web:www.rapid7.com

    CVE-2026-73546 : envoyproxy envoy: Envoy is an open source edge and service proxy designed for cloud-native applications. View severity, references, and remediation details from Rapid7.

    2026-09-22 16:47 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-73546.json.

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-73546",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-21T20:07:05.340873Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-21T20:07:34.119Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        },
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            ],
            "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-pv9h-4fxf-7vrg"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
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          "product": "envoy",
          "vendor": "envoyproxy",
          "versions": [
            {
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            },
            {
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            },
            {
              "status": "affected",
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        }
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      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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      "problemTypes": [
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              "lang": "en",
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      "providerMetadata": {
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        "discovery": "UNKNOWN"
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    }
  },
  "cveMetadata": {
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    "datePublished": "2026-09-21T19:53:21.443Z",
    "dateReserved": "2026-08-12T20:53:46.379Z",
    "dateUpdated": "2026-09-21T20:07:34.119Z",
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