Vulnerability · Published Oct 7, 2026 · Assigned by cisco

CVE-2026-76267Log Injection through the REST API in Splunk App for Splunk O11y Cloud

Medium 4.3

In plain English

A medium-severity security flaw in Splunk Enterprise from Splunk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.2%top 87.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Splunk	Splunk Enterprise	10.4 – before 10.4.310.2 – before 10.2.710.0 – before 10.0.10

Weakness: CWE-117 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References

https://advisory.splunk.com/advisories/SVD-2026-1001