CVE-2026-76366Network attack vector

Session-token disclosure via hidden-value filter matching

Published Aug 19, 2026 · Updated Aug 20, 2026

Information disclosure in Splunk SOAR before 8.6.0 allows remote authenticated users to recover session tokens through playbook-run REST filters. The playbook-run REST endpoint lets filters match session-token values that the response itself hides, creating an oracle for token recovery. A valid account is required, and a recovered token exposes all data available to the affected user without granting broader access.

CVSS severity6.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Splunk SOAR before 8.6.0 allows remote authenticated users to recover session tokens through playbook-run REST filters. The playbook-run REST endpoint lets filters match session-token values that the response itself hides, creating an oracle for token recovery. A valid account is required, and a recovered token exposes all data available to the affected user without granting broader access.

The record

CVE
CVE-2026-76366
Published
Aug 19, 2026
Updated
Aug 20, 2026
Vendor
Splunk, Inc.
Product
Splunk SOAR
Classifications
CWE-200, T1528
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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 privilegesauthenticated

What is affected?

Splunk, Inc. · Splunk SOARversion=8.6 <8.6.0

Published CVSS scores

6.5SplunkCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1528Steal Application Access Token

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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