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Full vulnerability report · 2026
CVE-2026-71475High confidence

Insights-client-rhel9: insights-client: spoke-controlled clusterid injected unencoded into insights api url path

Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.13

5.0MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2026-71475 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityinsights-client-rhel9: insights-client: Spoke-controlled ClusterID injected unencoded into Insights API URL path
20 fixed

The vendor explicitly identifies these products or versions as containing the fix.

  • registry.redhat.io/rhacm2/insights-client-rhel9@sha256:537de767f601dcf50bda77f5dd30db30b4c80f5b8f96e14646c2cd5ac0dff40a_arm64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.13
  • registry.redhat.io/rhacm2/insights-client-rhel9@sha256:606e1b82a1b2af84477860b1f30de6153741a322d5fb3e52ef613ff141ae4ce5_ppc64le as a component of Red Hat Advanced Cluster Management for Kubernetes 2.13
  • registry.redhat.io/rhacm2/insights-client-rhel9@sha256:6992f5fa3c450250c72b093f9514cacee23617bef892b2e71e8ec00a408c39d0_s390x as a component of Red Hat Advanced Cluster Management for Kubernetes 2.13
  • registry.redhat.io/rhacm2/insights-client-rhel9@sha256:945d48295ae375358fcd9e6a808b8862c4c6e215681cd56c3d0ff10401c4aff8_amd64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.13
  • registry.redhat.io/rhacm2/insights-client-rhel9@sha256:181780b5f0e725e081544a15c2eb5d7db4b4549086e8821ca8b93b4f591028ed_amd64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.14
  • registry.redhat.io/rhacm2/insights-client-rhel9@sha256:464b4b109bd3ec70e6494ba620593f3e7ce122812dc1afe82c3e5f4022313ec0_ppc64le as a component of Red Hat Advanced Cluster Management for Kubernetes 2.14
  • registry.redhat.io/rhacm2/insights-client-rhel9@sha256:d8a148175b7571488284dc8195118d300906dda3f687eedc19dc2f35f550d39e_arm64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.14
  • registry.redhat.io/rhacm2/insights-client-rhel9@sha256:e6b93f3275cdd47ec83fc13900d93628da562b5077a1881fae7319059da046b2_s390x as a component of Red Hat Advanced Cluster Management for Kubernetes 2.14
  • registry.redhat.io/rhacm2/insights-client-rhel9@sha256:3b44bbca3e5d4b9f4e7a71735b9da48d5c985a2478a04e1f7f42753a0b2c76f5_ppc64le as a component of Red Hat Advanced Cluster Management for Kubernetes 2.15
  • registry.redhat.io/rhacm2/insights-client-rhel9@sha256:819a522380075db1997770fca7c1f1a3b6fbfbd044761d80c876abb735652035_arm64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.15
  • registry.redhat.io/rhacm2/insights-client-rhel9@sha256:86840f16a20d13870471cd2e8a2a3ea49f77cb5fad58768fced51cc4e6786280_s390x as a component of Red Hat Advanced Cluster Management for Kubernetes 2.15
  • registry.redhat.io/rhacm2/insights-client-rhel9@sha256:cbdadc6f8a26e231a5789a38aa90aaf190744b0b63c8b8305bed70427a9a005f_amd64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.15
Summary
A flaw was found in insights-client. A compromised managed cluster, referred to as a 'spoke', can inject unencoded data into the Insights API URL path. This occurs because the ClusterID, which is controlled by the spoke, is used directly in the request path without proper validation or URL encoding. This vulnerability allows a malicious spoke to redirect authenticated requests to unintended API endpoints, potentially leading to information disclosure or unauthorized access.
Remediation
Before you apply this update, make sure all previously released errata that are relevant to your system are applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-56899

No EUVD known-exploited evidence

A flaw was found in insights-client. A compromised managed cluster, referred to as a 'spoke', can inject unencoded data into the Insights API URL path. This occurs because the ClusterID, which is controlled by the spoke, is used directly in the request path without proper validation or URL encoding. This vulnerability allows a malicious spoke to redirect authenticated requests to unintended API endpoints, potentially leading to information disclosure or unauthorized access.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
6.8 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

A flaw was found in insights-client. A compromised managed cluster, referred to as a 'spoke', can inject unencoded data into the Insights API URL path. This occurs because the ClusterID, which is controlled by the spoke, is used directly in the request path without proper validation or URL encoding. This vulnerability allows a malicious spoke to redirect authenticated requests to unintended API endpoints, potentially leading to information disclosure or unauthorized access.

What

A flaw was found in insights-client. A compromised managed cluster, referred to as a 'spoke', can inject unencoded data into the Insights API URL path. This occurs because the ClusterID, which is controlled by the spoke, is used directly in the request path without proper validation or URL encoding. This vulnerability allows a malicious spoke to redirect authenticated requests to unintended API endpoints, potentially leading to information disclosure or unauthorized access.

Why

Attacker-controlled path data is not constrained to the intended directory before the application accesses a file.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may obtain information outside the intended access boundary.

What

A flaw was found in insights-client. A compromised managed cluster, referred to as a 'spoke', can inject unencoded data into the Insights API URL path. This occurs because the ClusterID, which is controlled by the spoke, is used directly in the request path without proper validation or URL encoding. This vulnerability allows a malicious spoke to redirect authenticated requests to unintended API endpoints, potentially leading to information disclosure or unauthorized access.

Why

Attacker-controlled path data is not constrained to the intended directory before the application accesses a file.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may obtain information outside the intended access boundary.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') → obtain information outside the intended access boundary
Attack surface
Network
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Changed: exploitation can affect a different security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-22 ↗

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'). The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SChangedScope: The attack can affect a component governed by a different security authority.CLowConfidentiality impact: A successful attack can cause a limited loss.INoneIntegrity impact: No direct loss is represented by this metric.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkCWE-22
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-56899Official EUVD mapping

A flaw was found in insights-client. A compromised managed cluster, referred to as a 'spoke', can inject unencoded data into the Insights API URL path. This occurs because the ClusterID, which is controlled by the spoke, is used directly in the request path without proper validation or URL encoding. This vulnerability allows a malicious spoke to redirect authenticated requests to unintended API endpoints, potentially leading to information disclosure or unauthorized access.

Official EUVD record ↗
JVN iPedia · Japanese · JVNDB-2026-029928レッドハットのRed Hat Advanced Cluster Management for Kubernetes等の複数製品におけるパストラバーサルの脆弱性

insights-clientに脆弱性が発見されました。管理されたクラスター（「スポーク」と呼ばれる）が改ざんされると、エンコードされていないデータをInsights APIのURLパスに注入することが可能になります。これは、スポークによって制御されるClusterIDが、適切な検証やURLエンコードを行わずにリクエストパスに直接使用されているために発生します。この脆弱性により、悪意のあるスポークが認証済みリクエストを意図しないAPIエンドポイントにリダイレクトし、情報漏洩や不正アクセスを引き起こす可能性があるものです。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
Action
Before you apply this update, make sure all previously released errata that are relevant to your system are applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 11 Aug 2026 · Last source change 27 Aug 2026, 02:20 UTC · CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-56899
Product sourceCNA
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD modified after enrichment

Missing structured fields: affected versions. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    See the vendor and CVE records for the affected range. · Fixed: 1787259125 < *; 1786882244 < *; 1787238585 < *; 1787184541 < *; 1787227689 < *
    After
    See the vendor and CVE records for the affected range. · Fixed: Red Hat Advanced Cluster Management for Kubernetes 2.13: 1787259125 < *; Red Hat Advanced Cluster Management for Kubernetes 2.14: 1786882244 < *; Red Hat Advanced Cluster Management for Kubernetes 2.15: 1787238585 < *; Red Hat Advanced Cluster Management for Kubernetes 2.16: 1787184541 < *; Red Hat Advanced Cluster Management for Kubernetes 2.17: 1787227689 < *
    CNA ↗
  2. CVSS scoreCVSS score changed from 6.8 (CVSS 3.1 · CNA · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N) to 5.0 (CVSS 3.1 · CNA · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N).
    Before
    6.8 (CVSS 3.1 · CNA · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N)
    After
    5.0 (CVSS 3.1 · CNA · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N)
    CNA ↗
  3. CVSS scoreCVSS score changed from 5.0 (CVSS 3.1 · CNA · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N) to 6.8 (CVSS 3.1 · CNA · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N).
    Before
    5.0 (CVSS 3.1 · CNA · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N)
    After
    6.8 (CVSS 3.1 · CNA · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N)
    CNA ↗
  4. Affected versionsThe structured affected or fixed version information changed.
    Before
    See the vendor and CVE records for the affected range. · Fixed: 1787259125 < *; 1787238585 < *; 1787227689 < *
    After
    See the vendor and CVE records for the affected range. · Fixed: 1787259125 < *; 1786882244 < *; 1787238585 < *; 1787184541 < *; 1787227689 < *
    CNA ↗
  5. Vendor guidanceAuthoritative vendor guidance changed from authoritative remediation link · vendor advisory to authoritative remediation link · vendor advisory.
    Before
    authoritative remediation link · vendor advisory
    After
    authoritative remediation link · vendor advisory
    secalert@redhat.com ↗
  6. Vendor guidanceAuthoritative vendor guidance changed from vendor advisory to authoritative remediation link · vendor advisory.
    Before
    vendor advisory
    After
    authoritative remediation link · vendor advisory
    53f830b8-0a3f-465b-8143-3b8a9948e749 ↗
  7. Affected versionsThe structured affected or fixed version information changed.
    Before
    See the vendor and CVE records for the affected range. · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    See the vendor and CVE records for the affected range. · Fixed: 1787259125 < *; 1787238585 < *; 1787227689 < *
    CNA ↗
  8. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    53f830b8-0a3f-465b-8143-3b8a9948e749 ↗
  9. Vendor guidanceAuthoritative vendor guidance changed from no authoritative guidance recorded to vendor advisory.
    Before
    no authoritative guidance recorded
    After
    vendor advisory
    secalert@redhat.com ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2026-56899↗Vendor advisory↗Vendor advisory↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-71475 · cve.blacktree.nl