CVE-2026-73548
Envoy before 1.36.10 / 1.37.6 / 1.38.4 / 1.39.1: one advisory batch of six routing and access-control bypasses - a non-WebSocket upgrade is forwarded as a tunnel (request smuggling), HTTP RBAC is fooled by RFC-valid opaque header forms, path-parameter and dot-segment normalization disagree with the route matcher, and the admin /stats HTML view reflects unescaped input
- Severity
- high
- Affected product
- Envoy
- Affected versions
- Envoy < 1.36.10
- Affected versions
- Envoy ≥ 1.37.0, < 1.37.6
- Affected versions
- Envoy ≥ 1.38.0, < 1.38.4
- Affected versions
- Envoy ≥ 1.39.0, < 1.39.1
- Fixed in
- Envoy 1.36.10
- Fixed in
- Envoy 1.37.6
- Fixed in
- Envoy 1.38.4
- Fixed in
- Envoy 1.39.1
- Detection basis
- Component version range
- Shipped rule
- Envoy: Envoy before 1.36.10 / 1.37.6 / 1.38.4 / 1.39.1: one advisory batch of six routing and access-control bypasses - a non-WebSocket upgrade is forwarded as a tunnel (request smuggling), HTTP RBAC is fooled by RFC-valid opaque header forms, path-parameter and dot-segment normalization disagree with the route matcher, and the admin /stats HTML view reflects unescaped input
Envoy: Envoy 1.37.x before 1.37.6: one advisory batch of six routing and access-control bypasses (upgrade-tunnel request smuggling, HTTP RBAC header-form bypass, path normalization vs route-match disagreement, admin /stats HTML XSS)
Envoy: Envoy 1.38.x before 1.38.4: one advisory batch of six routing and access-control bypasses (upgrade-tunnel request smuggling, HTTP RBAC header-form bypass, path normalization vs route-match disagreement, admin /stats HTML XSS)
Envoy: Envoy 1.39.x before 1.39.1: one advisory batch of six routing and access-control bypasses (upgrade-tunnel request smuggling, HTTP RBAC header-form bypass, path normalization vs route-match disagreement, admin /stats HTML XSS) - Added to NewScan
- 2026-09-22
- Detected by
- NewScan — free, self-hosted
How NewScan reports it
COMPONENT VERSION RANGE
NewScan fingerprints Envoy from its response and reports this CVE when the detected version falls inside the affected range below.
COMPONENT VERSION RANGE
NewScan fingerprints Envoy from its response and reports this CVE when the detected version falls inside the affected range below.
COMPONENT VERSION RANGE
NewScan fingerprints Envoy from its response and reports this CVE when the detected version falls inside the affected range below.
COMPONENT VERSION RANGE
NewScan fingerprints Envoy from its response and reports this CVE when the detected version falls inside the affected range below.
References
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