Envoy Proxy URI Path Validation Issue in Envoy Proxy
CVE-2025-46821

5.3MEDIUM

Key Information:

Vendor

Envoyproxy

Status
Envoy
Vendor
CVE Published:
7 May 2025

What is CVE-2025-46821?

Envoy Proxy's URI template matcher exhibits a flaw that inadequately validates the * character within URI paths. Before the fixed versions, URIs containing this character would not comply with URI template expressions, potentially leading to unauthorized access through the bypass of role-based access control (RBAC) rules. This vulnerability emphasizes the importance of configuring additional permissions using url_path with a safe_regex expression as a workaround. The issue has been rectified in Envoy versions 1.34.1, 1.33.3, 1.32.6, and 1.31.8.

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Affected Version(s)

envoy < 1.31.8 < 1.31.8

envoy >= 1.32.0, < 1.32.6 < 1.32.0, 1.32.6

envoy >= 1.33.0, < 1.33.3 < 1.33.0, 1.33.3

References

https://github.com/envoyproxy/envoy/security/advisories/G...
x_refsource_CONFIRM

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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