SB2026021964 - Client‑side DoS in Splunk Enterprise
Published: February 19, 2026
Security Bulletin ID
SB2026021964
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Resource exhaustion (CVE-ID: CVE-2026-20139)
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources. A remote user that does not hold the “admin” or “power” Splunk roles can craft a malicious payload into the realname, tz, or email parameters of the /splunkd/__raw/services/authentication/users/username REST API endpoint when they change a password and perform a client‑side denial‑of‑service attack.
Remediation
Install update from vendor's website.