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CVE-2026-76348

Missing Authorization in Search Head Cluster Member Controls in Splunk Enterprise

Description

In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, a user who holds a Splunk role that contains the high-privilege list_search_head_clustering capability could send a read request to Search Head Cluster member control endpoints and change cluster state, which could allow for a denial of service. The vulnerability is possible because the Search Head Cluster member control endpoints do not require a state-changing Hypertext Transfer Protocol (HTTP) request type before they apply read-only authorization.

Timeline

  1. ID reserved

    By cisco

  2. Published

  3. · 1 day later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-76348, by who scored it
Scored byCVSSScoreVector
ciscoCNA (assigner)3.1Low3.8CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
NVDNVD · Analyzed3.1Low3.8CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
EPSS (exploitation in 30 days)
0.32% · top 75% of all CVEs (11 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.8.

Affected products

  • Splunk · Splunk Enterprise

    • affected 10.4 – < 10.4.2
    • affected 10.2 – < 10.2.6
    • affected 10.0 – < 10.0.9
    • affected 9.4 – < 9.4.14

What to do

Solution: Upgrade Splunk Enterprise to versions 10.4.2, 10.2.6, 10.0.9, and 9.4.14, or higher.

Workaround: Remove the list_search_head_clustering capability from Splunk roles if they do not need Search Head Cluster status information. For more information see [Define roles on the Splunk platform with capabilities](https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.2/manage-splunk-platform-users-and-roles/define-roles-on-the-splunk-platform-with-capabilities) in the Splunk documentation.

References

References1

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .