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CVE-2026-76401— Regular Expression Denial of Service (DoS) through the REST API in Splunk Connect for Kafka

Quick assessment

Affected
Splunk Splunk Connect for Kafka
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Splunk Connect for Kafka是美国Splunk公司的一款将Kafka数据接入分析平台的连接器。 Splunk Connect for Kafka 2.2.7之前版本存在资源管理错误漏洞，该漏洞源于时间戳提取功能在无时间限制的情况下评估用户提供的正则表达式，可能导致未经身份验证的攻击者通过Kafka Connect REST API配置特制正则表达式和匹配事件数据，阻塞Kafka Connect工作线程，停止受影响连接器的事件传递。

CVSS 5.9 · Medium EPSS 0.29% · P21

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Splunk Splunk Connect for Kafka 2.2< 2.2.7 affected
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I. Basic Information for CVE-2026-76401

Vulnerability Information
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Vulnerability Title
Regular Expression Denial of Service (DoS) through the REST API in Splunk Connect for Kafka
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
Source: CVE Program / CVE List V5
Vulnerability Title
Splunk Connect for Kafka 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Splunk Connect for Kafka是美国Splunk公司的一款将Kafka数据接入分析平台的连接器。 Splunk Connect for Kafka 2.2.7之前版本存在资源管理错误漏洞，该漏洞源于时间戳提取功能在无时间限制的情况下评估用户提供的正则表达式，可能导致未经身份验证的攻击者通过Kafka Connect REST API配置特制正则表达式和匹配事件数据，阻塞Kafka Connect工作线程，停止受影响连接器的事件传递。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Splunk Splunk Connect for Kafka 2.2 ~ 2.2.7 -

II. Public POCs for CVE-2026-76401

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III. Intelligence Information for CVE-2026-76401

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Vendor Advisories for CVE-2026-76401 (1)

Same Patch Batch · Splunk · 2026-08-19 · 110 CVEs total

CVE-2026-76311 9.4 CRITICAL Improper Access Control in Embedded Report Dispatch Archives in Splunk Enterprise
CVE-2026-76312 9.4 CRITICAL Improper Access Control through Embedded Reports in Splunk Enterprise
CVE-2026-76310 9.4 CRITICAL Improper Access Control through Embedded Report REST API Requests in Splunk Enterprise
CVE-2026-76404 9.1 CRITICAL Remote Code Execution (RCE) through Deserialization of Untrusted Data in Splunk MCP Server
CVE-2026-76335 8.8 HIGH Remote Code Execution (RCE) through Splunk Web Manager Configuration in Splunk Enterprise
CVE-2026-76351 8.8 HIGH Server-Side Request Forgery (SSRF) through the Report Notification REST API in Splunk Secu
CVE-2026-76253 8.8 HIGH Privilege Escalation through Scheduled Search Alert Action Configuration in Splunk Enterpr
CVE-2026-76315 8.8 HIGH Code Injection through Splunk Web Manager Configuration in Splunk Enterprise
CVE-2026-76352 8.8 HIGH Improper Authorization through the REST API in Splunk Enterprise
CVE-2026-76317 8.8 HIGH Path Traversal through the Lookup Configuration REST API in Splunk Enterprise
CVE-2026-76313 8.8 HIGH Remote Code Execution (RCE) through the REST API in Splunk Enterprise
CVE-2026-76395 8.8 HIGH Remote Code Execution (RCE) through Deserialization of Untrusted Data in the Model Loading
CVE-2026-76389 8.8 HIGH Server-Side Request Forgery (SSRF) through the REST API in Cisco Talos Intelligence for En
CVE-2026-76350 8.8 HIGH Improper Privilege Management through PDF Attachments for Email Alert Actions in Splunk En
CVE-2026-76319 8.8 HIGH Remote Code Execution (RCE) through Federated Search in Splunk Enterprise
CVE-2026-76314 8.8 HIGH Remote Code Execution (RCE) through Splunk Web Manager Configuration in Splunk Enterprise
CVE-2026-76259 8.8 HIGH Improper Privilege Management on the Management Port in Splunk Enterprise for Windows
CVE-2026-76316 8.8 HIGH Stored SPL Injection through Deployment Server Broker Registration in Splunk Enterprise
CVE-2026-76391 8.3 HIGH Improper Privilege Management through Agent Run History in Splunk AI Toolkit
CVE-2026-76394 8.3 HIGH Missing Authorization in Container and Connection Management through the REST API in Splun

Showing top 20 of 110 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Splunk Connect for Kafka
Same vendor: Splunk
Same weakness: CWE-407

V. Comments for CVE-2026-76401

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