CVE-2026-35211: opencti before 7.260401.0 (exclusive), < 7.260401.0

CVE-2026-35211. CVSS 3.1 base score 6.5 (MEDIUM, Vendor/CNA). EPSS 0.00522 (percentile 0.43526), scored 24-Oct-2026.

Affected technology

opencti · before 7.260401.0 (exclusive)
citeum

opencti · < 7.260401.0
OpenCTI-Platform

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · Low privileges required · No user interaction required

What an attacker can do

Any authenticated user with the KNOWLEDGE capability can pass user-supplied Elasticsearch Painless script values directly into search queries without validation or sanitization, allowing computationally expensive scripts to consume cluster CPU resources and degrade or deny service for all users. Vendor/CNA’s CVSS 3.1 assessment (base score 6.5/10) rates confidentiality and integrity impact as none; availability impact as high.

Published 25-Oct-2026 19:52 UTC

CWE: CWE-94, CWE-863
CCR priority: 26.1 /100 (P4)
CVSS 3.1: 6.5 /10 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H · Vendor/CNA
EPSS: 0.00522 · percentile 0.44034 · 2026-10-25
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-25 19:52:47.952465+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-25 19:51:06.643138+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-35211.html