CVE-2026-76827 — Search-indexer: search-indexer: update/delete operations not scoped to caller's cluster (cross-tenant data tampering)
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…
Published: 2026-08-19 · CVSS: 6.8 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7