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Vulnerabilities

Vulnerability · CVE-2025-46821

Envoy is a cloud-native edge/middle/service proxy.

Published May 7, 2025 · catalog updated May 8, 2025 · Envoy is a cloud-native

Check if you run it

No confirmed exploitation is on record for CVE-2025-46821. EPSS is 0.27%. Act only if a listed version of Envoy is a cloud-native is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Envoy is a cloud-native).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.27%
Remediation
Version ranges on file
Affected products
vendor envoyproxy envoy < 1.31.8

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 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 with expression.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor envoyproxy envoy < 1.31.8< 1.31.8

How to fix CVE-2025-46821

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-46821. EPSS is 0.27%. Act only if a listed version of Envoy is a cloud-native is installed.

Which versions are affected?

Compare what you have installed with envoyproxy envoy < 1.31.8 < 1.31.8. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.27%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 7, 2025 · EUVD

    Detected

    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 permissions. This vulnerabil

  2. May 8, 2025 · EUVD

    Updated

    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 permissions. This vulnerabil

Sources

  • CVE.orgVulnerability recordCVE-2025-46821

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-46821

    30-day exploitation probability 0.3%

    first.org
  • EUVDVulnerability recordEUVD-2025-13934

    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

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.