CVE-2026-76278 Splunk CVE debrief

Who should care

Splunk Enterprise administrators and users with the edit_spl2_module_permissions capability should assess their exposure and take necessary actions to prevent unauthorized access. This includes verifying the version of Splunk Enterprise, restricting the edit_spl2_module_permissions capability, and updating to a fixed version if necessary. Additionally, security teams and vulnerability management teams should be aware of the potential impact and ensure that

Why it matters

Defenders should care about CVE-2026-76278 because it allows users with a specific capability to access sensitive SPL2 module permissions without proper authorization. This vulnerability affects Splunk Enterprise versions below 10.4.3, 10.2.7, and 10.0.10. The impact includes potential unauthorized access and increased risk of privilege escalation. Defenders should verify exposure, restrict capabilities, and update systems to a fixed version.

• Potential unauthorized access to sensitive SPL2 module permissions
• Increased risk of privilege escalation for users with edit_spl2_module_permissions capability
• Need for verification of user permissions to prevent data exposure
• Priority on updating Splunk Enterprise to a fixed version

Technical summary

The vulnerability exists in Splunk Enterprise versions below 10.4.3, 10.2.7, and 10.0.10. A user with the edit_spl2_module_permissions capability can access permission grants for SPL2 modules they shouldn't view due to insufficient verification of user permissions. This happens because Splunk Enterprise doesn't verify if a user can read the requested app before returning SPL2 module permission grants via a REST API. The affected versions are confirmed, and defenders should verify exposure and update systems to a fixed version.

Defensive priority

Defenders should prioritize verifying exposure in Splunk Enterprise environments, especially for users with the edit_spl2_module_permissions capability, and ensure systems are updated to a fixed version.

Recommended defensive actions

• Verify Splunk Enterprise version and exposure to the vulnerability
• Restrict edit_spl2_module_permissions capability to necessary users
• Update Splunk Enterprise to version 10.4.3, 10.2.7, or 10.0.10
• Monitor for unauthorized access to SPL2 module permissions
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and source item provide details on the vulnerability, affected versions, and a reference to the vendor's advisory. The vulnerability exists in Splunk Enterprise versions below 10.4.3, 10.2.7, and 10.0.10. A user with the edit_spl2_module_permissions capability can access permission grants for SPL2 modules they shouldn't view due to insufficient verification of user permissions. Evidence is limited, and defenders should verify exposure and update systems to a fixed version.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.