4.9

CVE-2026-56143: elastic elasticsearch

CVSS: 4.9v3.1MediumAnalyzed
AliasesCGA-5m6g-vjvr-7xx3CGA-78r2-2jh6-6ch5
Published 01-09-2026Last modified 01-09-2026
Open JSON

Vulnerability summary

CVE-2026-56143 is a medium (CVSS 4.9) vulnerability in elastic elasticsearch. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 37.1% 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
0.44%
0%100%
Low · +0.13 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 01-09-2026
    PublishedVulnerability first disclosed.
  2. 01-09-2026
    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 request that causes excessive memory consumption, which may render the affected node unavailable.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.44%

Chance of exploitation in the next 30 days

Percentile

37%

Versus all other CVEs

30-day change

+0.13 pp

From 0.31% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.44%

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

Chainguard1 product
  • elasticsearch-9.2All versions (No fix recorded)
Elastic1 product
  • elasticsearch≥ 8.0.0, ≤ 8.19.19 | ≥ 9.0.0, ≤ 9.2.8 | ≥ 8.0.0, < 8.19.20 | ≥ 9.0.0, < 9.3.0

2 vendors · 2 products

References

3 links