CVE-2026-73546

HIGHPre-NVD 7.47.4—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6%, top 53% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 4 sources updated this week
7.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.4Exploit: None knownExposed: 0

A fix is available — apply it.

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.

CVSS v3
7.4
EG Score
7.4(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity74% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

September 21, 2026

Last Modified

September 23, 2026

Advisory Details (9)

Auto-updated Sep 21, 2026
Patch available. Sources: github_commit, github_release, github.
github_release Patch Available

v1.39.1

Patch available: envoyproxy/envoy v1.39.1

https://github.com/envoyproxy/envoy/releases/tag/v1.39.1
github_release Patch Available

v1.38.4

Patch available: envoyproxy/envoy v1.38.4

https://github.com/envoyproxy/envoy/releases/tag/v1.38.4
github_release Patch Available

v1.37.6

Patch available: envoyproxy/envoy v1.37.6

https://github.com/envoyproxy/envoy/releases/tag/v1.37.6
github_release Patch Available

v1.36.10

Patch available: envoyproxy/envoy v1.36.10

https://github.com/envoyproxy/envoy/releases/tag/v1.36.10
github_commit

commit ab63a0e52b5a (envoyproxy/envoy)

Fix landed in envoyproxy/envoy commit ab63a0e52b5a — awaiting tagged release

https://github.com/envoyproxy/envoy/commit/ab63a0e52b5a28472f2ff865b6464ae4004f7593
github_commit

commit 9484e17c3435 (envoyproxy/envoy)

Fix landed in envoyproxy/envoy commit 9484e17c3435 — awaiting tagged release

https://github.com/envoyproxy/envoy/commit/9484e17c34353662f9bfd30c74f61fa8c9ee7b83
github_commit

commit 884d30c56b83 (envoyproxy/envoy)

Fix landed in envoyproxy/envoy commit 884d30c56b83 — awaiting tagged release

https://github.com/envoyproxy/envoy/commit/884d30c56b835d5801733ae1dc38c94a08de23e8
github_commit

commit 11d34660ca03 (envoyproxy/envoy)

Fix landed in envoyproxy/envoy commit 11d34660ca03 — awaiting tagged release

https://github.com/envoyproxy/envoy/commit/11d34660ca0322eb125d045a564d9d87f016397f
github Patch Available

Stored XSS in Admin Stats Interface (/stats?format=html) · Advisory · envoyproxy/envoy · GitHub

https://github.com/envoyproxy/envoy/security/advisories/GHSA-pv9h-4fxf-7vrg

Vendor Advisories for CVE-2026-73546(6)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatopenshift-service-mesh/istio-proxyv2-rhel9:17883278662026-09-08redhat
redhatopenshift-service-mesh/istio-proxyv2-rhel9:17883339242026-09-08redhat
redhatopenshift-service-mesh/istio-proxyv2-rhel9:17882963282026-09-08redhat
redhatopenshift-service-mesh/istio-proxyv2-rhel9:17882947152026-09-08redhat
redhatopenshift-service-mesh/istio-proxyv2-rhel9:17883293662026-09-08redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 14× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-23 18:26 UTCEG score recompute
  2. 2026-09-23 18:26 UTCVendor advisory
  3. 2026-09-23 17:54 UTCEPSS rescore
  4. 2026-09-23 17:53 UTCVendor advisory
  5. 2026-09-23 06:46 UTCVendor advisory
  6. 2026-09-22 19:38 UTCEG score recompute
  7. 2026-09-22 19:38 UTCVendor advisory
  8. 2026-09-22 08:31 UTCVendor advisory
  9. 2026-09-21 21:22 UTCVendor advisory
  10. 2026-09-21 20:18 UTCEG score recompute
  11. 2026-09-21 20:18 UTCVendor advisory
  12. 2026-09-21 20:00 UTCEG score recompute
  13. 2026-09-21 20:00 UTCVendor advisory
  14. 2026-09-21 20:00 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-73546?
CVE-2026-73546 is a high vulnerability published on September 21, 2026. 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…
When was CVE-2026-73546 disclosed?
CVE-2026-73546 was first published in the National Vulnerability Database on September 21, 2026, with the most recent update on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73546 actively exploited?
CVE-2026-73546 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 52.7% of all scored CVEs.
What is the CVSS score of CVE-2026-73546?
CVE-2026-73546 has a CVSS v3 base score of 7.4 (NVD).
How do I remediate CVE-2026-73546?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73546, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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