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CVE-2025-46821

Envoy vulnerable to bypass of RBAC uri_template permission

Published: May 7, 2025Updated: Sep 3, 2025 Sources: CVE List NVDCWE-186
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.2%
Top 87.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-186

Affected Products

envoyenvoyproxy
On-prem
Cloud & SaaS / api-gateway
envoyproxyoss-projectUSCloud & SaaSaka envoy proxy, envoy

Exploitability

Official Patch Available

References

https://github.com/envoyproxy/envoy/security/advisories/GHSA-c7cm-838g-6g67
github.com

Timeline

Published
May 7, 2025
Last Updated
Sep 3, 2025

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