Ali Yousefzadeh@aliyousefzade76
CVE-2025-46821: Envoy Proxy RBAC Authorization Bypass https://www.alirunaiops.com/notes/cve-2025-46821-envoy-proxy-rbac-bypass
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CVE-2025-46821(envoyproxy / envoy)
LOWCVSS 5.3 · MEDIUMSignal is active with 1 mentions in latest observed window
Immediate actions
- Track advisory updates for patch or workaround availability
Recommended action window: Monitor and triage in normal cycle
NVD 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.
0.0/ 10 priority
Sources & remediation
Vendor / third-party advisories
Weakness type (CWE)
CWE-186
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
Are you affected?
If you run products in this scope, you should treat this CVE as relevant to your environment.
- envoy
Threat summary
- 1 mentions across 1 observed day
What's happening
- 1 total mentions across 1 day
Affected systems
Vendors
Products
envoy
1 version affected across 1 product
Deep dive
Activity timeline1 mentions / 1d
Referenced assets1 URL
Full discourse1 post
CPE platform detail2 entries
2 of 2 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | envoyproxy | envoy | - | - | - |
| App | envoyproxy | envoy | 1.34.0 | - | - |