CVE-2025-46821— Envoy vulnerable to bypass of RBAC uri_template permission
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是Enphase开源的一款用于连接智能家居设备的网关程序。 Envoy 1.34.1之前版本存在安全漏洞，该漏洞源于URI模板匹配器错误排除字符，可能导致RBAC规则绕过。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-46821
Vulnerability Information
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Vulnerability Title
Envoy vulnerable to bypass of RBAC uri_template permission
Source: CVE Program / CVE List V5
Vulnerability Description
Envoy is a cloud-native edge/middle/service proxy. Prior to versions 1.34.1, 1.33.3, 1.32.6, and 1.31.8, Envoy's URI template matcher incorrectly excludes the `*` character from a set of valid characters in the URI path. As a result URI path containing the `*` character will not match a URI template expressions. This can result in bypass of RBAC rules when configured using the `uri_template` permissions. This vulnerability is fixed in Envoy versions v1.34.1, v1.33.3, v1.32.6, v1.31.8. As a workaround, configure additional RBAC permissions using `url_path` with `safe_regex` expression.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
过度严格的正则表达式
Source: CVE Program / CVE List V5
Vulnerability Title
Envoy 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Envoy是Enphase开源的一款用于连接智能家居设备的网关程序。 Envoy 1.34.1之前版本存在安全漏洞，该漏洞源于URI模板匹配器错误排除字符，可能导致RBAC规则绕过。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| envoyproxy | envoy | < 1.31.8 | - |
|
II. Public POCs for CVE-2025-46821
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same product: envoy
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CVE-2026-73511
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CVE-2026-73553
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CVE-2026-73551
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CVE-2026-73546
Envoy: Stored XSS in Admin Stats Interface (/stats?format=ht -
CVE-2026-73512
Envoy: use-after-free in QUIC on internal redirects
Same vendor: envoyproxy
-
CVE-2026-73511
Envoy: Potential path-matching/authentication bypass when us -
CVE-2026-73553
Envoy: RBAC Authorization Bypass via Path Parameters -
CVE-2026-73551
Envoy: Path normalization does not handle dot and dotdot seg -
CVE-2026-73546
Envoy: Stored XSS in Admin Stats Interface (/stats?format=ht -
CVE-2026-73512
Envoy: use-after-free in QUIC on internal redirects
V. Comments for CVE-2025-46821
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