CVE-2026-76827 MEDIUM

CVE-2026-76827: Search-indexer: search-indexer: update/delete operations not scoped to caller's cluster (cross-tenant data tampering)

Weakness CWE-693
Published August 19, 2026
Last update August 27, 2026
View on NVD All CVEs

CVSS base score

6.8/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality None
Integrity High

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 19, 2026 CVE published
August 27, 2026 Record updated