CVE-2026-76271: Denial of Service (DoS) in the Discover Splunk Observability Cloud app for Splunk Enterprise
In Splunk Enterprise versions below 10.4.3, 10.2.7, and 10.0.10, a low-privileged user that does not hold the "admin" or "power" Splunk roles could cause a denial of service against a Representational State Transfer (REST) API endpoint in the Discover Splunk Observability Cloud app. The vulnerability is possible because the app uses an inefficient regular expression to validate input submitted through the endpoint. For more information see About configuring role-based user access (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.4/manage-splunk-platform-users-and-roles/about-configuring-role-based-user-access), Splunk Observability Cloud previews (https://help.splunk.com/en/splunk-enterprise/search/search-manual/10.4/observability/splunk-observability-cloud-previews), and restmap.conf (https://help.splunk.com/en/splunk-enterprise/administer/admin-manual/10.4/configuration-file-reference/10.4.0-configuration-file-reference/restmap.conf) in the Splunk documentation.
Splunk Enterprise versions 9.4.x are not affected.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Splunk Enterpriseto a version that resolves this vulnerability.Fixed in 10.4.3 - Upgrade
Upgrade
Splunk Enterpriseto a version that resolves this vulnerability.Fixed in 10.2.7 - Upgrade
Upgrade
Splunk Enterpriseto a version that resolves this vulnerability.Fixed in 10.0.10 - Upgrade
Upgrade
Splunk Enterpriseto a version that resolves this vulnerability.Fixed in 9.4.15
Event History
Frequently Asked Questions
Which Splunk Enterprise releases are affected?
Affected releases are versions below 10.4.3, 10.2.7, and 10.0.10. Splunk Enterprise 9.4.x is not affected.
What level of access does an attacker need?
An attacker needs a low-privileged Splunk user account. The issue can be exploited by users who do not hold the admin or power roles.
What component is targeted during exploitation?
The denial of service targets a REST API endpoint in the Discover Splunk Observability Cloud app. The endpoint's input validation uses an inefficient regular expression.