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…

PriorityP428medium5.3CVSS 3.1

AVNACLPRNUINSUCNILAN

EPSS

0.22%

12.5th percentile

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.

Affected

12 ranges

Vendor	Product	Version range	Fixed in
envoyproxy	envoy	< 1.31.8	1.31.8
envoyproxy	envoy	—	—
envoyproxy	envoy	—	—
envoyproxy	envoy	—	—
envoyproxy	envoy	—	—
envoyproxy	envoy	>= 1.32.0 < 1.32.6	1.32.6
envoyproxy	envoy	>= 1.33.0 < 1.33.3	1.33.3
msrc	azl3_kernel_6.6.47.1-1_on_azure_linux_3.0	—	—
msrc	azl3_kernel_6.6.51.1-5_on_azure_linux_3.0	—	—
msrc	azure_linux_3.0_arm	—	—
msrc	azure_linux_3.0_x64	—	—
msrc	cbl2_kernel_5.15.180.1-1_on_cbl_mariner_2.0	—	—

CVSS provenance

nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

vendor_msrc7.8HIGH

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