CVE-2022-23652

Name: CVE-2022-23652
Creator: NVD / NIST
Published: 2022-02-22T20:15:07.763+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.38%

Last modified Jun 17, 2026

CVE-2022-23652 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. capsule-proxy is a reverse proxy for Capsule Operator which provides multi-tenancy in Kubernetes. In versions prior to 0.2.1 an attacker with a proper authentication mechanism may use a malicious `Connection` header to start a privilege escalation attack towards the Kubernetes API Server. EPSS estimates a 1.38% chance of exploitation in the next 30 days.

Description

capsule-proxy is a reverse proxy for Capsule Operator which provides multi-tenancy in Kubernetes. In versions prior to 0.2.1 an attacker with a proper authentication mechanism may use a malicious `Connection` header to start a privilege escalation attack towards the Kubernetes API Server. This vulnerability allows for an exploit of the `cluster-admin` Role bound to `capsule-proxy`. There are no known workarounds for this issue.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

1.38%

68.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Clastix	Capsule-Proxy	< 0.2.1

References

https://github.com/clastix/capsule-proxy/commit/efe91f68ebf8a9e3d21491dc57da7b8a746415d8Patch, Third Party Advisory
https://github.com/clastix/capsule-proxy/issues/188Exploit, Issue Tracking, Third Party Advisory
https://github.com/clastix/capsule-proxy/security/advisories/GHSA-9cwv-cppx-mqjmThird Party Advisory
https://github.com/clastix/capsule-proxy/commit/efe91f68ebf8a9e3d21491dc57da7b8a746415d8Patch, Third Party Advisory
https://github.com/clastix/capsule-proxy/issues/188Exploit, Issue Tracking, Third Party Advisory
https://github.com/clastix/capsule-proxy/security/advisories/GHSA-9cwv-cppx-mqjmThird Party Advisory

Timeline

Published: Feb 22, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-23652?

How severe is CVE-2022-23652?

CVE-2022-23652 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.38% probability of exploitation in the next 30 days.

How do I fix CVE-2022-23652?

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-2022-23652?

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

Scan your code now

Source: NVD / NIST