CVE-2026-76268Network attack vectorHinoki check available

Unauthenticated command execution via Patroni REST API

Published Oct 7, 2026 · Updated Oct 7, 2026

Authentication bypass in Splunk Enterprise 10.2.0 through 10.2.6 and 10.4.0 through 10.4.2 lets remote attackers run commands via Patroni. The Patroni REST API on a search head cluster member accepts critical configuration operations without authenticating the caller, allowing attacker-controlled operating-system commands to execute. Exploitation requires network access to that API on a clustered search head; Splunk documents the affected Storage sidecar as Linux-only.

CVSS severity9.8
Critical
EPSS probability1.59%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authentication bypass in Splunk Enterprise 10.2.0 through 10.2.6 and 10.4.0 through 10.4.2 lets remote attackers run commands via Patroni. The Patroni REST API on a search head cluster member accepts critical configuration operations without authenticating the caller, allowing attacker-controlled operating-system commands to execute. Exploitation requires network access to that API on a clustered search head; Splunk documents the affected Storage sidecar as Linux-only.

The record

CVE
CVE-2026-76268
Published
Oct 7, 2026
Updated
Oct 7, 2026
Vendor
Splunk, Inc.
Product
Splunk Enterprise
Classifications
CWE-306, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.2 <10.2.7
  2. Affected versionversion=10.4 <10.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Splunk, Inc. · Splunk Enterpriseversion=10.2 <10.2.7; version=10.4 <10.4.3

Published CVSS scores

9.8Splunk, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

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Technologies

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