SecuriTricks - CVE-2025-46821

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.

Product(s) Impacted

Vendor	Product	Versions
Envoy	Envoy	<1.34.1, <1.33.3, <1.32.6, <1.31.8

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-186

Overly Restrictive Regular Expression

A regular expression is overly restrictive, which prevents dangerous values from being detected.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	envoy	envoy	<1.34.1	/	/	/	/	/	/	/
a	envoy	envoy	<1.33.3	/	/	/	/	/	/	/
a	envoy	envoy	<1.32.6	/	/	/	/	/	/	/
a	envoy	envoy	<1.31.8	/	/	/	/	/	/	/

References

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

CVSS Score

5.3 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: LOW
Privileges Required: NONE
Scope: UNCHANGED
Confidentiality Impact: LOW
Integrity Impact: NONE
Availability Impact: NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

View Vector String

Timeline

Published: May 7, 2025, 10:15 p.m.
Last Modified: May 7, 2025, 10:15 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

security-advisories@github.com

CVE-2025-46821