CVE-2026-76267
Log Injection through the REST API in Splunk App for Splunk O11y Cloud
Splunk Splunk EnterpriseApplications & CMS
CVSS
4.3MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.17%Chance of exploitation activity in the next 30 days, higher than 6% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Description
In Splunk Enterprise versions below 10.4.3, 10.2.7, and 10.0.10, a user that holds a role with the read_o11y_content capability could inject forged entries into the app log through the Representational State Transfer (REST) API. The vulnerability is possible because Splunk App for Splunk O11y Cloud does not neutralize user-supplied SignalFlow content before writing it to the app log.
Splunk Enterprise versions 9.4.x are not affected.
Text from CVE List
Affected versions 3
- Splunk Enterpriseaffected: 10.4 before 10.4.3CVE List
- Splunk Enterpriseaffected: 10.2 before 10.2.7CVE List
- Splunk Enterpriseaffected: 10.0 before 10.0.10CVE List