Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 6.8.16, the OpenCTI platform’s data ingestion feature accepts user-supplied URLs without validation and uses the Axios HTTP client with its default configuration (allowAbsoluteUrls: true). This allows attackers to craft requests to arbitrary endpoints, including internal services, because Axios will accept and process absolute URLs. This results in a semi-blind SSRF, as responses may not be fully visible but can still impact internal systems. This vulnerability is fixed in 6.8.16.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
STABLE
If you run products in this scope, you should treat this CVE as relevant to your environment.
| Date | Total | Labels |
|---|
| 2026-03-12 | 2 | Disclosure1General1 |
| 2026-06-22 | 1 | Disclosure1 |
🔴 OpenCTI, Server-Side Request Forgery (SSRF), #CVE-2026-21887 (High) -DC-Jun2026-545 https://dailycve.com/opencti-server-side-request-forgery-ssrf-cve-2026-21887-high-dc-jun2026-545/
Post summary
The tweet announces the discovery of a new high‑severity SSRF vulnerability (CVE‑2026‑21887) affecting OpenCTI, with no additional details or mitigation information provided.
CVE-2026-21887 OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 6.8.16, the OpenCTI platform’s data ingestion feature ac… https://www.cve.org/CVERecord?id=CVE-2026-21887
Post summary
The post references CVE‑2026‑21887 for OpenCTI’s data ingestion feature, linking to the CVE record, but provides no additional technical, exploit, or mitigation information.
CVE-2026-21887 Server-Side Request Forgery (SSRF) in OpenCTI Platform Before 6.8.16 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-21887
Post summary
The post discloses an SSRF vulnerability (CVE‑2026‑21887) affecting OpenCTI Platform before version 6.8.16, with no PoC or exploitation details shared.
1 of 1 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | citeum | opencti | - | - | - |