Medium severity · published May 7, 2025
CVE-2025-46821
Envoy is a cloud-native edge/middle/service proxy
5.3
CVSS
0.3%
EPSS
No
On KEV
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EN
Envoy · Envoyproxy
before 1.31.8; 1.32.0 before 1.32.6; 1.33.0 before 1.33.3; 1.34.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-46821
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-46821
Vendor Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-c7cm-838g-6g67
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