CVE-2026-76345: In Splunk Enterprise versions below 10.4.2, a user with a high-privilege Splunk role that can manage search he

Routine

MEDIUM 6.0UPGRADE

CVE-2026-76345 is a medium-severity flaw (CVSS 6.0) affecting splunk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Splunk Enterprise versions below 10.4.2, a user with a high-privilege Splunk role that can manage search head clustering could use the search head cluster member bundle Representational State Transfer (REST) API to write files to locations that the user account running Splunk Enterprise can write to, which could allow for remote code execution. Successful exploitation could result in access to all relevant data and could affect the integrity a

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.0 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-284
Published	2026-08-19
Last modified	2026-08-21

Publisher (CNA): Cisco Systems, Inc. · Vendor: splunk

Last updated 2026-08-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-19 22:17 UTCPublished CVE record published
2026-08-21 19:09 UTCUpdated Record last modified

splunk splunk UPGRADE

Affected: >= 10.4.0 and < 10.4.2

Fixed in: 10.4.2

Safe to downgrade to: a release before 10.4.0

1. Check installed version

apt-cache policy splunk || rpm -q splunk || splunk --version

2. UPGRADE to 10.4.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade splunk

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade splunk

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 10.4.0 (Debian / Ubuntu)

apt-cache madison splunk sudo apt install splunk=<VERSION_BEFORE_10.4.0> sudo apt-mark hold splunk

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list splunk sudo dnf downgrade splunk-<VERSION_BEFORE_10.4.0> sudo dnf versionlock add splunk

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-76345?

splunk: upgrade to 10.4.2. Exact commands for each OS are on this page.

Is CVE-2026-76345 being exploited?

CVE-2026-76345 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-76345 affect?

CVE-2026-76345 affects splunk. Severity is medium (CVSS 6.0). In Splunk Enterprise versions below 10.4.2, a user with a high-privilege Splunk role that can manage search head clustering could use the search head cluster member bundle Representational State Transfer (REST) API to write files to locatio

How urgent is CVE-2026-76345?

Priority 32/100. No elevated risk signals yet.

Software pages

Splunk vulnerabilities

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References

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