CVE-2026-76401 — Regular Expression Denial of Service (DoS) through the REST API in Splunk Connect for Kafka

Description (CNA)

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 timestamp extraction with a crafted regular expression and matching event data to block a Kafka Connect worker thread, stopping event delivery for the affected connector. The vulnerability is possible because timestamp extraction evaluates customer-supplied regular expressions without a time limit. 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) and 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) in the Splunk documentation.

Affected (CNA)

Vendor / product	Versions
Splunk / Splunk Connect for Kafka	affected 2.2 before 2.2.7

CWE

CWE-407

References

https://advisory.splunk.com/advisories/SVD-2026-0808

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.