CVE-2026-76356Network attack vector

Unauthenticated code execution via spoofed source IP

Published Aug 19, 2026 · Updated Aug 21, 2026

Authentication bypass in Splunk SOAR before 8.6.0 allows remote attackers to execute arbitrary code via a spoofed source-IP header. The Automation Broker notification endpoint accepts a client-supplied source IP header as proof that the request came from the local system, so forged requests can reach code paths intended only for trusted local originators. Exposure requires network reachability to the notification endpoint, and successful exploitation can run code on the SOAR host with resulting confidentiality, integrity, and availability impact.

CVSS severity8.1
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Splunk SOAR before 8.6.0 allows remote attackers to execute arbitrary code via a spoofed source-IP header. The Automation Broker notification endpoint accepts a client-supplied source IP header as proof that the request came from the local system, so forged requests can reach code paths intended only for trusted local originators. Exposure requires network reachability to the notification endpoint, and successful exploitation can run code on the SOAR host with resulting confidentiality, integrity, and availability impact.

The record

CVE
CVE-2026-76356
Published
Aug 19, 2026
Updated
Aug 21, 2026
Vendor
Zoom Video Communications, Inc.
Product
Splunk SOAR
Classifications
CWE-290, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 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=8.6 <8.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Zoom Video Communications, Inc. · Splunk SOARversion=8.6 <8.6.0

Published CVSS scores

8.1SplunkCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
T1190Exploit Public-Facing Application

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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