CVE-2026-76820

highpriority · track · 0EPSS 0.004 · 36 %ileDE
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.41% (36th) EPSS
CVSS 7.7 · high
Is it mine?
6 products
Check your exposure
Who says so?
1 sources
cert_bund

EPSS · scored 2026-10-26

OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 7.260701.0, the synchronizerFetch GraphQL query called fetchRemoteStreams after checking only that a remote stream URL used HTTP or HTTPS. The backend did not apply the ingestion deny list or reject private, loopback, and link-local destinations, allowing an authenticated account with the INGESTION capability to make OpenCTI request internal services and cloud metadata endpoints. Returned connection errors could distinguish open HTTP ports, open non-HTTP ports, and closed ports, enabling internal network scanning, while compatible endpoint responses could disclose internal data. This issue is fixed in version 7.260701.0.

01

cvss

Technical severity, 0–10. One row per scoring source.

7.7
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.7highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:Nsecondary · security-advisories@github.comexploitability 3.1 · impact 4
v3.17.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-918US
04

affected products (6)

Products and version ranges known to be affected.

05

advisories (1)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-3210OpenCTI: Mehrere SchwachstellenDeutsch2026-09-06csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in OpenCTI ausnutzen, um beliebigen Code beziehungsweise Befehle im Kontext des OpenCTI-Servers auszuführen, interne Netzwerkdienste und Cloud-Metadaten über SSRF aufzurufen oder auszuspähen sowie fremde Draft Workspaces einschließlich zugehöriger Dateien und Daten unberechtigt zu löschen.

06

sources

Which sources assert this record, and when.

cert_bundNVDCVE.orgMITRE
published 2026-09-15modified 2026-09-30
07

references (4) nvd

External citations — patches, advisories, analysis.

scry

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