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TI-2026-53352 Aliases CVE-2026-76252GHSA-rvpg-4h5m-w25c

Cross-Site Scripting (XSS) through Splunk Web Message Validation in Splunk Enterprise

Priority LOW 32CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.13, an unauthenticated user who tricks another user into visiting a malicious web page could run unauthorized JavaScript in that user's browser. This could allow for unauthorized access to all relevant data available to that user and actions that affect system integrity. The Cross-Site Scripting (XSS) is possible because Splunk Web does not validate the origin and source of messages received by a page message handler. The vulnerability requires the attacker to phish the affected user by tricking them into initiating a request within their browser. The unauthenticated user should not be able to exploit the vulnerability at will.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00263 18th percentileScored 2026-11-07
Fix Fixed Splunk Enterprise (Splunk): 10.4.2, 10.2.6, 10.0.9 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SplunkSplunk Enterprise10.4 to before 10.4.2; 10.2 to before 10.2.6; 10.0 to before 10.0.9; 9.4 to before 9.4.1310.4.2, 10.2.6, 10.0.9, 9.4.13Patch availableCNA
  • Splunk Enterprise VendorSplunk Affected 10.4 to before 10.4.2; 10.2 to before 10.2.6; 10.0 to before 10.0.9; 9.4 to before 9.4.13 Fixed in 10.4.2, 10.2.6, 10.0.9, 9.4.13 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*9.4.0 to before 9.4.13; 10.0.0 to before 10.0.9; 10.2.0 to before 10.2.6; 10.4.0 to before 10.4.2VulnerableSplunk
  • cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* Versions 9.4.0 to before 9.4.13; 10.0.0 to before 10.0.9; 10.2.0 to before 10.2.6; 10.4.0 to before 10.4.2 Vulnerable ·Splunk

Remediation

  • Fix · CNA Splunk Enterprise (Splunk) Fixed in 10.4.2, 10.2.6, 10.0.9, 9.4.13

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-76252
  2. 2026-10-03 Alias added: GHSA-rvpg-4h5m-w25c

References

Advisory 1

  • TI-2026-16444 Unauthenticated Arbitrary File Creation and Truncation in a PostgreSQL Sidecar Service Endpoint in Splunk Enterprise KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-00154 The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly… KEVCVSS 3.1HIGH 7.5
  • TI-2023-24841 Remote code execution (RCE) in Splunk Enterprise through Insecure XML Parsing CVSS 3.1HIGH 8.8
  • TI-2023-15979 ‘edit_user’ Capability Privilege Escalation CVSS 3.1HIGH 8.8
  • TI-2024-30707 Remote Code Execution (RCE) due to insecure session storage configuration in Splunk Enterprise on Windows CVSS 3.1HIGH 8.8
  • TI-2022-21345 Reflected Cross-Site Scripting via the radio template in Splunk Enterprise CVSS 3.1HIGH 8.8
See all 297 →

Sources

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