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CVE-2026-76827

MEDIUMCVSS 6.8/10EPSS 0.53%

Last modified

CVE-2026-76827 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. 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. EPSS estimates a 0.53% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
6.8/10

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

EPSS Probability
0.53%

44.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.11All versions
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.13All versions
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.14All versions
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.15All versions
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.16All versions
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.17All versions

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-76827?
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.
How severe is CVE-2026-76827?
CVE-2026-76827 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.
How do I fix CVE-2026-76827?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST