# CVE-2026-20254: Information Disclosure through External Content Restriction Bypass in Splunk Enterprise

> CVE-2026-20254: Information Disclosure through External Content Restriction Bypass in Splunk Enterprise. CVSS 5.7 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-20254
Last updated: 2026-06-17T10:17:20Z

- Published: 2026-06-10 17:15 UTC · Updated: 2026-06-17 10:17 UTC · Assigner: cisco
- CVSS: 5.7 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
- EPSS: 0.41%, 35th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-20

## Description

In Splunk Enterprise versions below 10.2.4, 10.0.7, 9.4.12, and 9.3.13, and Splunk Cloud Platform versions below 10.3.2512.13, 10.2.2510.15, 10.1.2507.23, and 9.3.2411.132, a low-privileged user that does not hold the 'admin' or 'power' Splunk roles could craft a malicious classic dashboard that exfiltrates sensitive data to an external server when a higher-privileged user views it, bypassing the external content restriction through a Cascading Style Sheets (CSS) injection.\<br\>\<br\>The Trusted Domains security check does not fully validate inline style attribute values, which can allow for outbound requests to untrusted domains and credential exfiltration when a victim views a crafted dashboard.

## Affected vendors and products

- Splunk: Splunk Cloud Platform
- 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-2026-20254)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-20254)
- [https://advisory.splunk.com/advisories/SVD-2026-0604](https://advisory.splunk.com/advisories/SVD-2026-0604)

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_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/)_


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Canonical: https://rewindex.com/cve/CVE-2026-20254 · Markdown: https://rewindex.com/cve/CVE-2026-20254.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-20254 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:15:53.405Z