Uncontrolled Recursion in Elasticsearch - CVE-2026-103008
Published: October 7, 2026
Vulnerability identifier: #VU153936
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-103008
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to uncontrolled recursion in Elasticsearch's geometry construction and serialization for scripted runtime fields when processing geometry values produced by scripts without a recursion-depth limit. A remote user can submit a specially crafted request defining a runtime field with a script that produces a deeply nested structure to cause a denial of service.
Exploitation requires read access to a single index. All configurations are affected.
Affected software
Elasticsearch
How to mitigate CVE-2026-103008
Install security update from vendor's website.
Elasticsearch - addressed in versions 8.19.23, 9.4.8, 9.5.5