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CVE-2026-76311

Splunk broken access control

9.4 CRITICALEPSS 0.45%
  1. Published19 Aug 2026

Description

In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, an unauthenticated user who has an embedded report token could download the dispatch archive for an embedded report search job and use exposed session material to access all relevant data and affect system integrity on the Splunk platform instance. The vulnerability is possible because the embedded report authorization flow does not block dispatch archive download requests before Splunk Enterprise begins sending the archive to the requester. For more information see Additional configuration for embedded reports (https://help.splunk.com/en/splunk-enterprise/create-dashboards-and-reports/reporting-manual/10.4/report-management/additional-configuration-for-embedded-reports) and Embed scheduled reports (https://help.splunk.com/en/splunk-enterprise/create-dashboards-and-reports/reporting-manual/10.4/report-management/embed-scheduled-reports) in the Splunk documentation.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Affected products

Splunk≥ 10.0.0 < 10.0.9 · ≥ 10.2.0 < 10.2.6 · ≥ 10.4.0 < 10.4.2 · ≥ 9.4.0 < 9.4.14

Remediation

Fixed in
Splunk≥ 10.0.9

References

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Frequently asked

Is CVE-2026-76311 being actively exploited?

CVE-2026-76311 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.45%.

How severe is CVE-2026-76311?

CVE-2026-76311 has a CVSS 3.1 base score of 9.4, rated critical. EPSS estimates a 0.45% probability of exploitation.

Which products are affected by CVE-2026-76311?

Affected products include Splunk.

How do I fix CVE-2026-76311?

Upgrade affected software to a fixed version, for example Splunk 10.0.9 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-76311 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.