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TI-2022-07704 Aliases CVE-2022-23652GHSA-9cwv-cppx-mqjm

Privilege escalation using hop-by-hop Connection header

Priority HIGH 73CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-287.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01397 72nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed capsule-proxy (clastix): 0.2.1github.com/clastix/capsule-proxy (Go): 0.2.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
clastixcapsule-proxybefore 0.2.10.2.1Patch availableCNA
—github.com/clastix/capsule-proxy (Go)before 0.2.10.2.1Patch availableGHSA-9cwv-cppx-mqjm
  • capsule-proxy Vendorclastix Affected before 0.2.1 Fixed in 0.2.1 Patch available CNA
  • github.com/clastix/capsule-proxy (Go) Vendor— Affected before 0.2.1 Fixed in 0.2.1 Patch available GHSA-9cwv-cppx-mqjm

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:clastix:capsule-proxy:*:*:*:*:*:*:*:*before 0.2.1Vulnerableclastix
  • cpe:2.3:a:clastix:capsule-proxy:*:*:*:*:*:*:*:* Versions before 0.2.1 Vulnerable ·clastix

Remediation

  • Fix · CNA capsule-proxy (clastix) Fixed in 0.2.1
  • Fix · GHSA-9cwv-cppx-mqjm github.com/clastix/capsule-proxy (Go) Fixed in 0.2.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-23652
  2. 2026-10-03 Alias added: GHSA-9cwv-cppx-mqjm

References

Exploit 1

Patch 1

Advisory 2

Other 1

  • TI-2023-26175 Authentication bypass using an empty token in capsule-proxy CVSS 3.1CRITICAL 9.8
  • TI-2023-24881 Service accounts can see namespaces of other tenants in capsule-proxy CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences