CVE-2026-76401: medium-severity vulnerability in Splunk Connect for Kafka
Regular Expression Denial of Service (DoS) through the REST API in Splunk Connect for Kafka
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.9epss 0.4%
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Splunk · Splunk Connect for KafkaRelated CVEs — Splunk Connect for Kafka
In the same product, most dangerous first.
CVE-2026-76402HIGHServer-Side Request Forgery (SSRF) through the REST API in Splunk Connect for KafkaEPSS 0.4%CVE-2026-76400MEDIUMDenial of Service (DoS) through the REST API in Splunk Connect for KafkaEPSS 0.4%CVE-2026-76403HIGHImproper Certificate Validation through HTTP Event Collector Kerberos Authentication in Splunk Connect for KafkaEPSS 0.2%