CVE-2026-76820 OpenCTI - Server Side Request Forgery

OpenCTI prior to 7.260701.0 contains a server-side request forgery caused by insufficient validation of remote stream URLs in synchronizerFetch GraphQL query, letting authenticated users with INGESTION capability scan internal networks and access internal data.

CVSS base score 7.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.41% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Server Side Request Forgery
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Published
15 September 2026
Updated
15 October 2026
Weakness
CWE-918

Vendor fix

Update to version 7.260701.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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