CVE-2026-76401
Regular Expression Denial of Service (DoS) through the REST API in Splunk Connect for Kafka
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 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.
Weakness: CWE-407
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Splunk Apps & Add-ons | SIEM & Log Management | cna-assigner |
Vendor-reported products (1)
- Splunk · Splunk Connect for Kafka
Credit
Gabriel Nitu, Splunk
Vendor remediation
Upgrade each affected Splunk app or add-on to the applicable fixed version listed in Product Status.