4.9

CVE-2026-56149: elastic elasticsearch

CVSS: 4.9v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-56149
Published 01-07-2026Last modified 01-07-2026
Open JSON

Vulnerability summary

CVE-2026-56149 is a medium (CVSS 4.9) vulnerability in elastic elasticsearch. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 41.8% of scored vulnerabilities.

Overall risk
20/100
0100
Low · default modelHow is this calculated?
CVSS score
4.9/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.50%
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. 01-07-2026
    PublishedVulnerability first disclosed.
  2. 01-07-2026
    Last modifiedVulnerability information updated.

Description

Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a denial of service via Excessive Allocation (CAPEC-130). A user with elevated privileges can submit a specially crafted machine learning request that causes excessive memory consumption, which may render the affected node unavailable.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.50%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

0.00 pp

From 0.50% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.50%

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
  • elasticsearch≥ 9.4.0, ≤ 9.4.2 | ≥ 9.0.0, ≤ 9.3.5 | ≥ 8.0.0, ≤ 8.19.16 | ≥ 8.0.0, < 8.19.17 | ≥ 9.0.0, < 9.3.6 | ≥ 9.4.0, < 9.4.3
Ubuntu1 product
  • elasticsearchAll versions (No fix recorded)

2 vendors · 2 products

References

3 links