6.5

CVE-2026-72647: elastic elasticsearch Uncontrolled Recursion

CVSS: 6.5v3.1MediumAnalyzed
AliasesCGA-5r63-wp2f-hm7rCGA-9v38-jr34-8xqpCGA-c25r-2xxh-w9c3
Published 13-08-2026Last modified 13-08-2026
Open JSON

Vulnerability summary

CVE-2026-72647 is a medium (CVSS 6.5) Uncontrolled Recursion vulnerability in elastic elasticsearch. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 35.2% 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 · +0.12 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 13-08-2026
    PublishedVulnerability first disclosed.
  2. 13-08-2026
    Last modifiedVulnerability information updated.

Description

Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via Serialized Data with Nested Payloads (CAPEC-230). An authenticated user holding only read privileges on a single index can submit one specially crafted search request whose deeply nested structure is processed without a depth limit, exhausting the thread stack and terminating the affected node.

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

+0.12 pp

From 0.30% on 21-09-2026

21-09-202621-10-2026
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-9.2All versions (No fix recorded)
  • elasticsearch-9.3All versions (No fix recorded)
Elastic1 product
  • elasticsearch≥ 8.0.0, ≤ 8.19.19 | ≥ 9.0.0, ≤ 9.4.4 | ≥ 8.0.0, < 8.19.20 | ≥ 9.0.0, < 9.4.5

2 vendors · 3 products

References

3 links