CVE-2026-76820Network attack vectorHinoki check available

Authenticated SSRF via unvalidated stream URL

Published Sep 15, 2026 · Updated Sep 15, 2026

SSRF in Filigran OpenCTI before 7.260701.0 allows remote authenticated users to scan internal services via a crafted stream URL. The synchronizerFetch GraphQL query passes HTTP or HTTPS stream URLs to fetchRemoteStreams without applying the ingestion deny list or rejecting private, loopback, and link-local destinations. An account with the INGESTION capability can distinguish port states from connection errors and read data returned by compatible internal or cloud metadata endpoints.

CVSS severityUnavailable
Unscored
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

SSRF in Filigran OpenCTI before 7.260701.0 allows remote authenticated users to scan internal services via a crafted stream URL. The synchronizerFetch GraphQL query passes HTTP or HTTPS stream URLs to fetchRemoteStreams without applying the ingestion deny list or rejecting private, loopback, and link-local destinations. An account with the INGESTION capability can distinguish port states from connection errors and read data returned by compatible internal or cloud metadata endpoints.

The record

CVE
CVE-2026-76820
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Filigran
Product
OpenCTI
Classifications
T1046
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 7.260701.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Filigran · OpenCTIversion=< 7.260701.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1046Network Service Scanning

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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