CVE-2026-76402 Server-Side Request Forgery (SSRF) through the REST API in Splunk Connect for Kafka

High 8.2 Published 19 Aug 2026 Updated 20 Aug 2026

Unauthenticated attackers can exploit SSRF in Splunk Connect for Kafka to steal credentials and compromise data delivery by configuring insecure HTTP endpoints.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-76402?

CVE-2026-76402 is a high-severity server-side request forgery vulnerability in Splunk Connect for Kafka, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In Splunk Connect for Kafka versions below 2.2.7, an unauthenticated user who can reach the Kafka Connect Representational State Transfer (REST) API could configure a non-secure Hypertext Transfer Protocol (HTTP) Event Collector endpoint in Splunk Enterprise that causes the connector to send authentication credentials to an attacker-controlled server, allowing for exposure of credentials that compromise all relevant data sent through the connector and limited alteration of event delivery. The vulnerability is possible because HTTP Event Collector endpoint validation does not require secure transport by default. For more information see Install Splunk Connect for Kafka (https://help.splunk.com/en/data-management/integrate-data-with-add-ons/splunk-connect-for-kafka/2.2/install/install-splunk-connect-for-kafka), Data ingestion parameters for Splunk Connect for Kafka (https://help.splunk.com/en/data-management/integrate-data-with-add-ons/splunk-connect-for-kafka/2.2/overview/data-ingestion-parameters-for-splunk-connect-for-kafka), and Set up and use HTTP Event Collector with configuration files (https://help.splunk.com/en/splunk-enterprise/get-data-in/get-started-with-getting-data-in/9.4/get-data-with-http-event-collector/set-up-and-use-http-event-collector-with-configuration-files) in the Splunk documentation.

Weakness: CWE-918

Which versions are affected by CVE-2026-76402?

It affects 1 product.

Products include Splunk Connect for Kafka.

How do I fix CVE-2026-76402?

No fix has been published for CVE-2026-76402 yet. Limit exposure of the affected software until one is available.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2026-76402 being exploited?

There is no known exploitation of CVE-2026-76402 in the wild and no public exploit code.

Sources

Also known as GHSA-mrh3-68v8-xhgq.