A flaw was found in search-indexer. This vulnerability allows a registered and authenticated managed cluster to tamper with or delete another cluster's indexed search data. This is possible because the delta-sync write paths in search-indexer do not properly restrict UPDATE/DELETE operations to data owned by the calling cluster. An attacker could exploit this by crafting specific user identifiers (UIDs) with a different cluster's prefix.
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

History

Fri, 21 Aug 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat advanced Cluster Management For Kubernetes
Vendors & Products Redhat advanced Cluster Management For Kubernetes

Fri, 21 Aug 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 20 Aug 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Wed, 19 Aug 2026 21:15:00 +0000

Type Values Removed Values Added
Description A flaw was found in search-indexer. This vulnerability allows a registered and authenticated managed cluster to tamper with or delete another cluster's indexed search data. This is possible because the delta-sync write paths in search-indexer do not properly restrict UPDATE/DELETE operations to data owned by the calling cluster. An attacker could exploit this by crafting specific user identifiers (UIDs) with a different cluster's prefix.
Title Search-indexer: search-indexer: update/delete operations not scoped to caller's cluster (cross-tenant data tampering)
First Time appeared Redhat
Redhat acm
Weaknesses CWE-693
CPEs cpe:/a:redhat:acm:2
Vendors & Products Redhat
Redhat acm
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-08-21T16:49:26.978Z

Reserved: 2026-08-19T19:55:53.101Z

Link: CVE-2026-76827

cve-icon Vulnrichment

Updated: 2026-08-21T16:49:11.427Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-08-19T21:17:39.227

Modified: 2026-08-21T17:16:46.273

Link: CVE-2026-76827

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-08-19T20:02:11Z

Links: CVE-2026-76827 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-21T21:16:12Z

Weaknesses