6.5

CVE-2026-63261: elastic kibana Uncontrolled Resource Consumption

CVSS: 6.5v3.1MediumAnalyzed
Published 21-07-2026Last modified 22-07-2026
Open JSON

Vulnerability summary

CVE-2026-63261 is a medium (CVSS 6.5) Uncontrolled Resource Consumption vulnerability in elastic kibana. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 39.4% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.47%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 21-07-2026
    PublishedVulnerability first disclosed.
  2. 22-07-2026
    Last modifiedVulnerability information updated.

Description

Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). A low-privileged authenticated user can send a specially crafted request to a Kibana machine learning feature, causing the server to exhaust available memory and become unavailable to all users.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

0.00 pp

From 0.47% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.47%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Elastic1 product
  • kibana≥ 8.0.0, ≤ 8.19.18 | ≥ 9.4.0, ≤ 9.4.3 | ≥ 9.0.0, ≤ 9.3.7 | ≥ 8.0.0, < 8.19.19 | ≥ 9.0.0, < 9.3.8 | ≥ 9.4.0, < 9.4.4

1 vendor · 1 product

References

1 links