What is CVE-2026-0531?

CVE-2026-0531 is a medium-severity vulnerability in Elastic Kibana, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-01-13.

How severe is CVE-2026-0531?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Elastic Kibana

CVE-2026-0531

Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana Fleet can lead to Excessive Allocation (CAPEC-130) via a specially crafted bulk retrieval request. This requires an attacker to have low-level privileges equivalent to the viewer role, which grants read access to agent policies. The crafted request can cause the application to perform redundant database retrieval operations that immediately consume memory until the server crashes and becomes unavailable to all users.

EPSS: 0.004 (34.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Elastic Kibana — versions 7.10.0, 8.0.0, 9.0.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

security@elastic.co (Vendor Advisory)

Frequently asked questions

What is CVE-2026-0531?: CVE-2026-0531 is a medium-severity vulnerability in Elastic Kibana, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-01-13.
How severe is CVE-2026-0531?: Medium severity. CVSS v3 base score is 6.5 out of 10.