Read the docs
TI-2026-53456 Aliases CVE-2026-76401GHSA-9w75-cvch-h753

Regular Expression Denial of Service (DoS) through the REST API in Splunk Connect for Kafka

Priority LOW 27CWE-407Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-407.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00381 32nd percentileScored 2026-11-07
Fix Fixed Splunk Connect for Kafka (Splunk): 2.2.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SplunkSplunk Connect for Kafka2.2 to before 2.2.72.2.7Patch availableCNA
  • Splunk Connect for Kafka VendorSplunk Affected 2.2 to before 2.2.7 Fixed in 2.2.7 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:splunk:connect_for_kafka:*:*:*:*:*:*:*:*before 2.2.7VulnerableSplunk
  • cpe:2.3:a:splunk:connect_for_kafka:*:*:*:*:*:*:*:* Versions before 2.2.7 Vulnerable ·Splunk

Remediation

  • Fix · CNA Splunk Connect for Kafka (Splunk) Fixed in 2.2.7

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Splunk Connect for Kafka 2.2.7

    4 records Highest priority Priority MEDIUM 1 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2026-53457 Server-Side Request Forgery (SSRF) through the REST API in Splunk Connect for KafkaPriority MEDIUM 42
    • TI-2026-53458 Improper Certificate Validation through HTTP Event Collector Kerberos Authentication in Splunk Connect for KafkaPriority LOW 34
    • TI-2026-53455 Denial of Service (DoS) through the REST API in Splunk Connect for KafkaPriority LOW 27
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-76401
  2. 2026-10-03 Alias added: GHSA-9w75-cvch-h753

References

Advisory 1

  • TI-2026-53457 Server-Side Request Forgery (SSRF) through the REST API in Splunk Connect for Kafka CVSS 3.1HIGH 8.2
  • TI-2026-53458 Improper Certificate Validation through HTTP Event Collector Kerberos Authentication in Splunk Connect for Kafka CVSS 3.1HIGH 7.4
  • TI-2026-53455 Denial of Service (DoS) through the REST API in Splunk Connect for Kafka CVSS 3.1MEDIUM 5.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences