CVE-2026-76827
This vulnerability allows a registered and authenticated managed cluster to tamper with or delete another cluster's indexed search data.
Does this matter?
Lower severity and a low EPSS score (0.32%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N
- EPSS
- 0.32% probability · 24th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-693
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2026:60386
- https://access.redhat.com/errata/RHSA-2026:60387
- https://access.redhat.com/errata/RHSA-2026:60388
- https://access.redhat.com/errata/RHSA-2026:60389
- https://access.redhat.com/errata/RHSA-2026:60390
- https://access.redhat.com/errata/RHSA-2026:60391
- https://access.redhat.com/security/cve/CVE-2026-76827
- https://bugzilla.redhat.com/show_bug.cgi?id=2519896
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.