01 Record

CVE-2026-17107

Cluster-proxy: impersonation-header injection grants cluster-admin on every managed cluster

HighPUBLISHEDCNA: redhat

CNA base score8.5 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

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02 Description

Cluster-proxy: impersonation-header injection grants cluster-admin on every managed cluster

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.35% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 27.5% of scored records. A rank, not a probability.

NVD base score

8.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-09-02.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-07-24 18:56Z1 MO AGO

Last updated

2026-09-02 17:54Z2 DAYS AGO

Reserved

2026-07-24

Assigning CNA

redhat

Record state

PUBLISHED

Severity

High (CVSS 8.5)

CNA CVSS vector

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

Weaknesses

CWE-441Unintended Proxy or Intermediary ('Confused Deputy')Class

Data version

5.2

Document digest

7b3d1113263a6b7ea0dec128fc72e86b36dde47cb119361c13c7c85f63e9e4e2

05 Affected products

VendorProductVersionsPlatforms

Red Hatmulticluster engine for Kubernetes 2.10Not specified—

Red Hatmulticluster engine for Kubernetes 2.11Not specified—

Red Hatmulticluster engine for Kubernetes 2.17Not specified—

Red Hatmulticluster engine for Kubernetes 2.6Not specified—

Red Hatmulticluster engine for Kubernetes 2.8Not specified—

Red Hatmulticluster engine for Kubernetes 2.9Not specified—

06 References

access.redhat.comRHSA-2026:46885https://access.redhat.com/errata/RHSA-2026:46885vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2026:47388https://access.redhat.com/errata/RHSA-2026:47388vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2026:47735https://access.redhat.com/errata/RHSA-2026:47735vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2026:47949https://access.redhat.com/errata/RHSA-2026:47949vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2026:47953https://access.redhat.com/errata/RHSA-2026:47953vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2026:47974https://access.redhat.com/errata/RHSA-2026:47974vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2026:48284https://access.redhat.com/errata/RHSA-2026:48284vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-17107vdb-entryx_refsource_REDHAT
bugzilla.redhat.comRHBZ#2506771https://bugzilla.redhat.com/show_bug.cgi?id=2506771issue-trackingx_refsource_REDHAT

01 Record index

CVE-2026-17107

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2026-17107

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References