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TI-2026-16445 Aliases CVE-2026-20254GHSA-c58f-cc4q-2mvj

Information Disclosure through External Content Restriction Bypass in Splunk Enterprise

Priority LOW 26CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00408 35th percentileScored 2026-11-07
Fix Fixed Splunk Enterprise (Splunk): 10.2.4, 10.0.7, 9.4.12 +1Splunk Cloud Platform (Splunk): 10.3.2512.13, 10.2.2510.15, 10.1.2507.23 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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 Enterprise10.2 to before 10.2.4; 10.0 to before 10.0.7; 9.4 to before 9.4.12; 9.3 to before 9.3.1310.2.4, 10.0.7, 9.4.12, 9.3.13Patch availableCNA
SplunkSplunk Cloud Platform10.3.2512 to before 10.3.2512.13; 10.2.2510 to before 10.2.2510.15; 10.1.2507 to before 10.1.2507.23; 9.3.2411 to before 9.3.2411.13210.3.2512.13, 10.2.2510.15, 10.1.2507.23, 9.3.2411.132Patch availableCNA
  • Splunk Enterprise VendorSplunk Affected 10.2 to before 10.2.4; 10.0 to before 10.0.7; 9.4 to before 9.4.12; 9.3 to before 9.3.13 Fixed in 10.2.4, 10.0.7, 9.4.12, 9.3.13 Patch available CNA
  • Splunk Cloud Platform VendorSplunk Affected 10.3.2512 to before 10.3.2512.13; 10.2.2510 to before 10.2.2510.15; 10.1.2507 to before 10.1.2507.23; 9.3.2411 to before 9.3.2411.132 Fixed in 10.3.2512.13, 10.2.2510.15, 10.1.2507.23, 9.3.2411.132 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*9.3.0 to before 9.3.13; 9.4.0 to before 9.4.12; 10.0.0 to before 10.0.7; 10.2.0 to before 10.2.4VulnerableSplunk
cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*9.3.2411 to before 9.3.2411.132; 10.1.2507 to before 10.1.2507.23; 10.2.2510 to before 10.2.2510.15; 10.3.2512 to before 10.3.2512.13VulnerableSplunk
  • cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* Versions 9.3.0 to before 9.3.13; 9.4.0 to before 9.4.12; 10.0.0 to before 10.0.7; 10.2.0 to before 10.2.4 Vulnerable ·Splunk
  • cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* Versions 9.3.2411 to before 9.3.2411.132; 10.1.2507 to before 10.1.2507.23; 10.2.2510 to before 10.2.2510.15; 10.3.2512 to before 10.3.2512.13 Vulnerable ·Splunk

Remediation

  • Fix · CNA Splunk Enterprise (Splunk) Fixed in 10.2.4, 10.0.7, 9.4.12, 9.3.13
  • Fix · CNA Splunk Cloud Platform (Splunk) Fixed in 10.3.2512.13, 10.2.2510.15, 10.1.2507.23, 9.3.2411.132

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Splunk Enterprise 10.0.7, 10.2.4 and 2 more versions

    7 records Highest priority Priority MEDIUM 1 MEDIUM, 6 LOW

    Other records, highest priority first

    • TI-2026-16442 Remote Code Execution through Deserialization of Untrusted Data in Splunk Secure GatewayPriority MEDIUM 64
    • TI-2026-16449 Stored Cross-Site Scripting (XSS) through Classic Dashboard in Splunk EnterprisePriority LOW 33
    • TI-2026-16443 Server-Side Request Forgery (SSRF) through Dashboard Studio PDF Export in Splunk EnterprisePriority LOW 33
    Show all 7 records →
  • Release ·

    Splunk Cloud Platform 10.1.2507.23, 10.2.2510.15 and 2 more versions

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2026-16447 Improper Input Validation through Protocol-Relative URL in Classic Dashboards in Splunk EnterprisePriority LOW 26
    • TI-2026-16446 Improper Input Validation through Classic Dashboards in Splunk EnterprisePriority LOW 26
    • TI-2026-16448 Improper Input Validation through Classic Dashboard CSS in Splunk EnterprisePriority LOW 25
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20254
  2. 2026-10-03 Alias added: GHSA-c58f-cc4q-2mvj

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

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences