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Fencer Vulns
medium 6.5

CVE-2026-72679 json

Uncontrolled Recursion in Elasticsearch Leading to Denial of Service

published 2026-08-13 2 mo ago modified 2026-09-08 2 mo ago also BIT-elasticsearch-2026-72679 , EUVD-2026-58253

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

Elasticsearch does not apply its configurable input length restriction to a user-supplied pattern accepted by an intervals query. Compiling a deeply nested pattern drives unbounded recursion that exhausts the thread stack and raises a fatal error, terminating the Elasticsearch node process and causing a denial of service for that node. An authenticated user holding only read-only privileges on a single searchable index can trigger the condition with one small search request.

Patch / fix

  • bitnami elasticsearch 8.19.20, 9.4.5
  • elastic elasticsearch 8.19.20, 9.4.5
  • elasticsearch elasticsearch 8.19.20, 9.4.5
  • org.elasticsearch elasticsearch 8.19.20, 9.4.5

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami elasticsearch
>=8.19.0, <8.19.20
>=9.0.0, <9.4.5
8.19.20
9.4.5

Affected products

  • Elastic Elasticsearch

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.