6.5

CVE-2026-63136: elastic elasticsearch Uncontrolled Resource Consumption

CVSS: 6.5v3.1MediumAnalyzed
AliasesCGA-28r2-2x8g-rph6CGA-4j8v-rm54-7gmwCGA-5f3p-9grc-qq98
Published 21-07-2026Last modified 22-07-2026
Open JSON

Vulnerability summary

CVE-2026-63136 is a medium (CVSS 6.5) Uncontrolled Resource Consumption vulnerability in elastic elasticsearch. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 34.9% 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
0.42%
0%100%
Low · +0.18 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 Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). A user with search privileges can submit a specially crafted search request that causes a data node to exhaust available heap memory, resulting in node unavailability and cluster degradation. An attacker could leverage this vulnerability to cause cluster downtime requiring manual intervention to restore service.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.42%

Chance of exploitation in the next 30 days

Percentile

35%

Versus all other CVEs

30-day change

+0.18 pp

From 0.24% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.42%

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

Chainguard2 products
  • elasticsearch-9.1All versions (No fix recorded)
  • elasticsearch-9.2All versions (No fix recorded)
Elastic1 product
  • elasticsearch≥ 8.0.0, ≤ 8.19.14 | ≥ 9.3.0, ≤ 9.3.3 | ≥ 9.0.0, ≤ 9.2.8 | ≥ 8.0.0, < 8.19.15 | ≥ 9.0.0, < 9.2.9 | ≥ 9.3.0, < 9.3.4

2 vendors · 3 products

References

3 links