CVE-2022-29226

Name: CVE-2022-29226
Creator: NVD / NIST
Published: 2022-06-09T20:15:08.077+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 1.23%

Last modified Jun 17, 2026

CVE-2022-29226 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. Envoy is a cloud-native high-performance proxy. In versions prior to 1.22.1 the OAuth filter implementation does not include a mechanism for validating access tokens, so by design when the HMAC signed cookie is missing a full authentication flow should be triggered. EPSS estimates a 1.23% chance of exploitation in the next 30 days.

Description

Envoy is a cloud-native high-performance proxy. In versions prior to 1.22.1 the OAuth filter implementation does not include a mechanism for validating access tokens, so by design when the HMAC signed cookie is missing a full authentication flow should be triggered. However, the current implementation assumes that access tokens are always validated thus allowing access in the presence of any access token attached to the request. Users are advised to upgrade. There is no known workaround for this issue.

Metrics

CVSS 3.1

9.1/10

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

EPSS Probability

1.23%

65.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-306

Affected Software

Vendor	Product	Versions
Envoyproxy	Envoy	< 1.22.1

References

https://github.com/envoyproxy/envoy/commit/7ffda4e809dec74449ebc330cebb9d2f4ab61360Patch, Third Party Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-h45c-2f94-prxhThird Party Advisory
https://github.com/envoyproxy/envoy/commit/7ffda4e809dec74449ebc330cebb9d2f4ab61360Patch, Third Party Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-h45c-2f94-prxhThird Party Advisory

Timeline

Published: Jun 9, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-29226?

How severe is CVE-2022-29226?

CVE-2022-29226 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.23% probability of exploitation in the next 30 days.

How do I fix CVE-2022-29226?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-29226?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST