CVE-2025-46821

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 v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

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

Configurations

No configuration.

History

08 May 2025, 14:39

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-05-07 22:15

Updated : 2025-05-08 14:39

NVD link : CVE-2025-46821

Mitre link : CVE-2025-46821

CVE.ORG link : CVE-2025-46821

JSON object : View

Products Affected

No product.

CWE

CWE-186

Overly Restrictive Regular Expression

{"id": "CVE-2025-46821", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "published": "2025-05-07T22:15:21.170", "references": [{"url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-c7cm-838g-6g67", "source": "security-advisories@github.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-186"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Envoy es un proxy de borde, intermedio y de servicio nativo de la nube. En versiones anteriores a las 1.34.1, 1.33.3, 1.32.6 y 1.31.8, el comparador de plantillas de URI de Envoy exclu\u00eda incorrectamente el car\u00e1cter `*` de un conjunto de caracteres v\u00e1lidos en la ruta de URI. Como resultado, una ruta de URI que contenga el car\u00e1cter `*` no coincidir\u00e1 con las expresiones de plantilla de URI. Esto puede provocar la omisi\u00f3n de las reglas RBAC al configurarse con los permisos `uri_template`. Esta vulnerabilidad se ha corregido en las versiones 1.34.1, 1.33.3, 1.32.6 y 1.31.8 de Envoy. Como workaround, configure permisos RBAC adicionales mediante `url_path` con la expresi\u00f3n `safe_regex`."}], "lastModified": "2025-05-08T14:39:09.683", "sourceIdentifier": "security-advisories@github.com"}