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CVE-2026-20252: The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. in Splunk Splunk Enterprise

0
High
VulnerabilityCVE-2026-20252cvecve-2026-20252
Published: Wed Jun 10 2026 (06/10/2026, 17:16:19 UTC)
Source: CVE Database V5
Vendor/Project: Splunk
Product: Splunk Enterprise

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 10.4.2604.3, 10.3.2512.12, 10.2.2510.14, 10.1.2507.22, and 9.3.2411.132, a low-privileged user that does not hold the "admin" or "power" Splunk roles could send server-side requests to arbitrary internal destinations through the Dashboard Studio PDF export feature. The vulnerability exists because the trusted-domain validation uses a prefix match that can be bypassed with attacker-controlled subdomains (for example, docs.splunk.com.evil.com), and because the PDF export service follows HTTP redirects automatically without re-validating each redirect target against the allowlist.

CVSS v3.1

Score 7.6high

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

Affected software

Affected versions
10.210.09.49.3

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 06/10/2026, 18:25:25 UTC

Technical Analysis

In affected versions of Splunk Enterprise and Splunk Cloud Platform, the Dashboard Studio PDF export feature does not sufficiently validate URLs requested from upstream components. The trusted-domain validation relies on a prefix match vulnerable to subdomain bypass (e.g., docs.splunk.com.evil.com). Additionally, the PDF export service automatically follows HTTP redirects without re-checking the redirect targets against the allowlist. This enables low-privileged users lacking admin or power roles to perform server-side request forgery (SSRF) to arbitrary internal destinations.

Potential Impact

An attacker with low privileges can exploit this vulnerability to make the Splunk server send requests to arbitrary internal network destinations. This can lead to unauthorized access to internal resources, potential data leakage, and partial service disruption. The CVSS score of 7.6 indicates high severity with high confidentiality impact, low integrity impact, and low availability impact.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the Dashboard Studio PDF export feature to trusted users only and monitor for unusual internal request patterns. Avoid exposing Splunk instances to untrusted networks. Follow vendor advisories closely for updates on patches or official mitigations.

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Technical Details

Data Version
5.2
Assigner Short Name
cisco
Date Reserved
2025-10-08T11:59:15.401Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 6a29aa2b1a4077f7803bb96c

Added to database: 6/10/2026, 6:17:15 PM

Last enriched: 6/10/2026, 6:25:25 PM

Last updated: 6/10/2026, 7:45:02 PM

Views: 7

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