Regular Expression Denial of Service (DoS) through the REST API in Splunk Connect for Kafka
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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| Splunk | Splunk Connect for Kafka | affected |
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No data.
| Vendor | Product | Versions | ||||||||
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| Splunk | Splunk Connect For Kafka |
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Vendor Solution
Upgrade each affected Splunk app or add-on to the applicable fixed version listed in Product Status.
Vendor Workaround
Restrict access to the Kafka Connect Representational State Transfer (REST) API to trusted administrative hosts and networks. Turn off timestamp extraction by setting enable.timestamp.extraction to false in the connector configuration if you do not use timestamp extraction functionality. For more information see [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.
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.381% probability within 30 days)
| Link | Providers |
|---|---|
| https://advisory.splunk.com/advisories/SVD-2026-0808 |
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| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
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| First Time appeared |
Splunk connect For Kafka
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| CPEs | cpe:2.3:a:splunk:connect_for_kafka:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Splunk connect For Kafka
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| Type | Values Removed | Values Added |
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| First Time appeared |
Splunk
Splunk splunk Connect For Kafka |
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| Vendors & Products |
Splunk
Splunk splunk Connect For Kafka |
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| 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. | |
| Title | Regular Expression Denial of Service (DoS) through the REST API in Splunk Connect for Kafka | |
| Weaknesses | CWE-407 | |
| References |
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| Metrics |
cvssV3_1
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