CVE-2026-21887 is a Server-Side Request Forgery (SSRF) vulnerability affecting the OpenCTI platform prior to version 6.8.16. This flaw allows attackers to craft requests to arbitrary internal endpoints due to unvalidated user-supplied URLs in the data ingestion feature. Rated High with a CVSS score of 7.7, this vulnerability has a network attack vector, low attack complexity, and requires low privileges, potentially leading to high confidentiality impact by enabling access to internal systems. There is currently no evidence of active exploitation, nor is public exploit code available in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage are also minimal.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 6.8.16CPE matchmatch criteria | cpe:2.3:a:citeum:opencti:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.