CVE-2026-76338

Improper Authentication through REST API Distributed Search Token Requests in Splunk Enterprise

HIGH

8.1

CVSS Score

Published: August 19, 2026 at 09:34 PM UTC

Updated: August 27, 2026 at 05:20 PM UTC

1 product affected across 1 vendorSplunk

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Severity

HIGH8.1

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

Description

In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, an unauthenticated user who has access to a trusted distributed search private key could forge an administrative session token, access all relevant data, affect system integrity, and disrupt service availability. The vulnerability is possible because the distributed search authentication token endpoint does not require a signed request to identify a configured search peer, allowing the request to fall back to shared local key material. For more information see About distributed search (https://help.splunk.com/en/splunk-enterprise/administer/distributed-search/10.4/overview-of-distributed-search/about-distributed-search) and authentication.conf (https://help.splunk.com/en/splunk-enterprise/administer/admin-manual/10.4/configuration-file-reference/10.4.2-configuration-file-reference/authentication.conf) in Splunk documentation.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Splunk · Splunk

95%

10.0 ≤ v < 10.0.910.0.0 ≤ v < 10.0.910.2 ≤ v < 10.2.610.2.0 ≤ v < 10.2.610.4 ≤ v < 10.4.210.4.0 ≤ v < 10.4.29.4 ≤ v < 9.4.149.4.0 ≤ v < 9.4.1410.0 10.2 10.4 9.4

Affected range stops below 10.0.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 10.2.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 10.4.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.4.14, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://advisory.splunk.com/advisories/SVD-2026-0801

References (1)

Vendor Advisory

Source: cverecord

https://advisory.splunk.com/advisories/SVD-2026-0801

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.1HIGHcisco

Vector?

Quick Info

StatusANALYZED

CWE

CWE-287

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