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TI-2026-53457 Aliases CVE-2026-76402GHSA-mrh3-68v8-xhgq

Server-Side Request Forgery (SSRF) through the REST API in Splunk Connect for Kafka

Priority MEDIUM 42CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

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 a non-secure Hypertext Transfer Protocol (HTTP) Event Collector endpoint in Splunk Enterprise that causes the connector to send authentication credentials to an attacker-controlled server, allowing for exposure of credentials that compromise all relevant data sent through the connector and limited alteration of event delivery. The vulnerability is possible because HTTP Event Collector endpoint validation does not require secure transport by default. 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), 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), and Set up and use HTTP Event Collector with configuration files (https://help.splunk.com/en/splunk-enterprise/get-data-in/get-started-with-getting-data-in/9.4/get-data-with-http-event-collector/set-up-and-use-http-event-collector-with-configuration-files) in the Splunk documentation.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00414 35th 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
Yes
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-2026-53458 Improper Certificate Validation through HTTP Event Collector Kerberos Authentication in Splunk Connect for KafkaPriority LOW 34
    • TI-2026-53456 Regular Expression Denial of Service (DoS) through the REST API in Splunk Connect for KafkaPriority LOW 27
    • 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-2026-76402
  2. 2026-10-03 Alias added: GHSA-mrh3-68v8-xhgq

References

Advisory 1

  • TI-2026-53458 Improper Certificate Validation through HTTP Event Collector Kerberos Authentication in Splunk Connect for Kafka CVSS 3.1HIGH 7.4
  • TI-2026-53456 Regular Expression Denial of Service (DoS) through the REST API in Splunk Connect for Kafka CVSS 3.1MEDIUM 5.9
  • 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