CVE-2026-76333Network attack vector

Stored XSS via unvalidated workflow-action URLs

Published Aug 19, 2026 · Updated Aug 19, 2026

Stored XSS in Splunk Enterprise before 10.4.2, 10.2.6, 10.0.9, and 9.4.14 lets remote authenticated users run JavaScript via crafted workflow-action URLs. Dashboard Studio accepts a crafted workflow-action URL for storage and does not sufficiently validate that URL before processing it when Event Actions invokes the stored action. Exploitation requires a user with the power role to plant the action and another authenticated user to click Continue after a phishing lure, after which the script can expose data or trigger actions available through Splunk Web as that victim.

CVSS severity7.1
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Splunk Enterprise before 10.4.2, 10.2.6, 10.0.9, and 9.4.14 lets remote authenticated users run JavaScript via crafted workflow-action URLs. Dashboard Studio accepts a crafted workflow-action URL for storage and does not sufficiently validate that URL before processing it when Event Actions invokes the stored action. Exploitation requires a user with the power role to plant the action and another authenticated user to click Continue after a phishing lure, after which the script can expose data or trigger actions available through Splunk Web as that victim.

The record

CVE
CVE-2026-76333
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
Zoom Video Communications, Inc.
Product
Splunk Enterprise
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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=10.0 <10.0.9
  2. Affected versionversion=10.2 <10.2.6
  3. Affected versionversion=10.4 <10.4.2
  4. Affected versionversion=9.4 <9.4.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zoom Video Communications, Inc. · Splunk Enterpriseversion=10.0 <10.0.9; version=10.2 <10.2.6; version=10.4 <10.4.2; version=9.4 <9.4.14

Published CVSS scores

7.1Cisco Systems, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:R/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 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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript

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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