CVE-2023-46254Network attack vector

Cross-tenant namespace disclosure via unscoped service-account indexing

Published Nov 6, 2023 · Updated Aug 2, 2024

Information disclosure in Project Capsule Capsule Proxy before 0.4.5 allows remote authenticated users to list other tenants' namespaces. The RoleBinding reflector indexes ServiceAccount owners by kind and name but omits the ServiceAccount namespace, so identically named accounts collide in its cache. Exploitation requires caching enabled and same-named ServiceAccount owners in different namespaces; Kubernetes RBAC still blocks access to the other tenant's namespace-scoped resources.

CVSS severity4.3
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Project Capsule Capsule Proxy before 0.4.5 allows remote authenticated users to list other tenants' namespaces. The RoleBinding reflector indexes ServiceAccount owners by kind and name but omits the ServiceAccount namespace, so identically named accounts collide in its cache. Exploitation requires caching enabled and same-named ServiceAccount owners in different namespaces; Kubernetes RBAC still blocks access to the other tenant's namespace-scoped resources.

The record

CVE
CVE-2023-46254
Published
Nov 6, 2023
Updated
Aug 2, 2024
Vendor
Project Capsule
Product
Capsule Proxy
Classifications
CWE-200, T1613
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.4.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Project Capsule · Capsule Proxyversion=< 0.4.5

Published CVSS scores

4.3GitHub Security AdvisoriesCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1613Container and Resource Discovery

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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