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TI-2026-16446 Aliases CVE-2026-20255GHSA-hw35-mvfj-v86g

Improper Input Validation through Classic Dashboards 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. The vulnerability exists because URL validation on the external content dialog is incomplete, which can allow for requests to untrusted domains when a user interacts with a crafted dashboard.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00351 28th 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-2026-16445 Information Disclosure through External Content Restriction Bypass 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-2026-20255
  2. 2026-10-03 Alias added: GHSA-hw35-mvfj-v86g

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