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TI-2026-16404 Aliases CVE-2026-20202GHSA-p3vg-7hj9-6f24

Improper Input Validation during User Account Creation in Splunk Enterprise

Priority LOW 31CWE-176Published · Updated

Key facts

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

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

Summary

In Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.10, and 9.3.11, and Splunk Cloud Platform versions below 10.4.2603.0, 10.3.2512.6, 10.2.2510.10, 10.1.2507.20, 10.0.2503.13, and 9.3.2411.127, a user who holds a role that contains the high-privilege capability `edit_user`could create a specially crafted username that includes a null byte or a non-UTF-8 percent-encoded byte due to improper input validation.<br><br>This could lead to inconsistent conversion of usernames into a proper format for storage and account management inconsistencies, such as being unable to edit or delete affected users.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00246 15th percentileScored 2026-11-07
Fix Fixed Splunk Enterprise (Splunk): 10.2.2, 10.0.5, 9.4.10 +1Splunk Cloud Platform (Splunk): Not Affected, 10.3.2512.6, 10.2.2510.10 +3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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 10.2.2; 10.0 to before 10.0.5; 9.4 to before 9.4.10; 9.3 to before 9.3.1110.2.2, 10.0.5, 9.4.10, 9.3.11Patch availableCNA
SplunkSplunk Cloud Platform10.4.2603 to before Not Affected; 10.3.2512 to before 10.3.2512.6; 10.2.2510 to before 10.2.2510.10; 10.1.2507 to before 10.1.2507.20; 10.0.2503 to before 10.0.2503.13; 9.3.2411 to before 9.3.2411.127Not Affected, 10.3.2512.6, 10.2.2510.10, 10.1.2507.20, 10.0.2503.13, 9.3.2411.127Patch availableCNA
  • Splunk Enterprise VendorSplunk Affected 10.2 to before 10.2.2; 10.0 to before 10.0.5; 9.4 to before 9.4.10; 9.3 to before 9.3.11 Fixed in 10.2.2, 10.0.5, 9.4.10, 9.3.11 Patch available CNA
  • Splunk Cloud Platform VendorSplunk Affected 10.4.2603 to before Not Affected; 10.3.2512 to before 10.3.2512.6; 10.2.2510 to before 10.2.2510.10; 10.1.2507 to before 10.1.2507.20; 10.0.2503 to before 10.0.2503.13; 9.3.2411 to before 9.3.2411.127 Fixed in Not Affected, 10.3.2512.6, 10.2.2510.10, 10.1.2507.20, 10.0.2503.13, 9.3.2411.127 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*9.3.0 to before 9.3.11; 9.4.0 to before 9.4.10; 10.0.0 to before 10.0.5; 10.2.0 to before 10.2.2VulnerableSplunk
cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*9.3.2411 to before 9.3.2411.127; 10.0.2503 to before 10.0.2503.13; 10.1.2507 to before 10.1.2507.20; 10.2.2510 to before 10.2.2510.10; 10.3.2512 to before 10.3.2512.6VulnerableSplunk
  • cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* Versions 9.3.0 to before 9.3.11; 9.4.0 to before 9.4.10; 10.0.0 to before 10.0.5; 10.2.0 to before 10.2.2 Vulnerable ·Splunk
  • cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* Versions 9.3.2411 to before 9.3.2411.127; 10.0.2503 to before 10.0.2503.13; 10.1.2507 to before 10.1.2507.20; 10.2.2510 to before 10.2.2510.10; 10.3.2512 to before 10.3.2512.6 Vulnerable ·Splunk

Remediation

  • Fix · CNA Splunk Enterprise (Splunk) Fixed in 10.2.2, 10.0.5, 9.4.10, 9.3.11
  • Fix · CNA Splunk Cloud Platform (Splunk) Fixed in Not Affected, 10.3.2512.6, 10.2.2510.10, 10.1.2507.20, 10.0.2503.13, 9.3.2411.127

Fixed in the same release

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

  • Release ·

    Splunk Enterprise 10.0.5, 10.2.2 and 2 more versions

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-16405 Improper Access Control in Data Model Acceleration in Splunk EnterprisePriority LOW 19
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20202
  2. 2026-10-03 Alias added: GHSA-p3vg-7hj9-6f24

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