# CVE-2026-76252: Cross-Site Scripting (XSS) through Splunk Web Message Validation in Splunk Enterprise

> CVE-2026-76252: Cross-Site Scripting (XSS) through Splunk Web Message Validation in Splunk Enterprise. CVSS 6.8 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-76252
Last updated: 2026-08-26T16:16:38Z

- Published: 2026-08-19 21:34 UTC · Updated: 2026-08-26 16:16 UTC · Assigner: cisco
- CVSS: 6.8 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
- EPSS: 0.26%, 18th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-79

## Description

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.

## Affected vendors and products

- Splunk: Splunk Enterprise

## Tracked companies

- [Splunk](https://rewindex.com/company/splunk.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-76252)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-76252)
- [https://advisory.splunk.com/advisories/SVD-2026-0801](https://advisory.splunk.com/advisories/SVD-2026-0801)

---

_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


---
Canonical: https://rewindex.com/cve/CVE-2026-76252 · Markdown: https://rewindex.com/cve/CVE-2026-76252.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-76252 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:00:50.039Z