{"id":"CVE-2026-76827","title":"A flaw was found in search-indexer","summary":"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-in…","severity":"medium","cvss":6.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N","cwe":["CWE-693"],"published":"2026-08-19","updated":"2026-09-05","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-76827","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:60386","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:60387","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:60388","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:60389","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:60390","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:60391","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-76827","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2519896","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-76827.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-76827"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-76827"}],"tags":["nvd","csaf","vex","red-hat"],"epss":0.00316,"epssPercentile":0.24756,"ingestedAt":"2026-09-05T19:43:55.542Z","vendor":"Red Hat","product":"Red Hat Advanced Cluster Management for Kubernetes 2.11","affected":["advanced_cluster_management_for_kubernetes 2.11","advanced_cluster_management_for_kubernetes 2.13","advanced_cluster_management_for_kubernetes 2.14","advanced_cluster_management_for_kubernetes 2.15","advanced_cluster_management_for_kubernetes 2.16","advanced_cluster_management_for_kubernetes 2.17"],"patched":["advanced_cluster_management_for_kubernetes 2.11","advanced_cluster_management_for_kubernetes 2.13","advanced_cluster_management_for_kubernetes 2.14","advanced_cluster_management_for_kubernetes 2.15","advanced_cluster_management_for_kubernetes 2.16","advanced_cluster_management_for_kubernetes 2.17"],"slug":"CVE-2026-76827","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:60387** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.11 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60387)\n- **RHSA-2026:60390** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.13 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60390)\n- **RHSA-2026:60388** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.14 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60388)\n- **RHSA-2026:60389** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.15 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60389)\n- **RHSA-2026:60391** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.16 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60391)\n- **RHSA-2026:60386** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.17 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60386)","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":37.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}