CVE-2026-76404— Remote Code Execution (RCE) through Deserialization of Untrusted Data in Splunk MCP Server app
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Splunk | Splunk MCP Server app | 1.2< 1.2.1 | affected |
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I. Basic Information for CVE-2026-76404
Vulnerability Information
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Vulnerability Title
Remote Code Execution (RCE) through Deserialization of Untrusted Data in Splunk MCP Server app
Source: CVE Program / CVE List V5
Vulnerability Description
In Splunk MCP Server app versions below 1.2.1, a user who holds the "admin" Splunk role could execute arbitrary commands on the underlying operating system. The vulnerability is possible because of missing input validation in the app's credential management component, which deserializes stored data without checking whether the content is of the expected type.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
Splunk MCP Server app 反序列化注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Splunk MCP Server app是美国Splunk公司的一款连接AI模型与数据平台的服务器应用。 Splunk MCP Server app 1.2.1之前版本存在反序列化注入漏洞，该漏洞源于应用的凭据管理组件缺少输入验证，反序列化存储数据时未检查内容是否为预期类型，可能导致具有admin Splunk角色的用户在底层操作系统上执行任意命令。
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 MCP Server app | 1.2 ~ 1.2.1 | - |
II. Public POCs for CVE-2026-76404
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-76404 (1)
Same Patch Batch · Splunk · 2026-08-19 · 110 CVEs total
| CVE-2026-76310 | 9.4 CRITICAL | Improper Access Control through Embedded Report REST API Requests in Splunk Enterprise |
| 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-2026-76335 | 8.8 HIGH | Remote Code Execution (RCE) through Splunk Web Manager Configuration in Splunk Enterprise |
| CVE-2026-76317 | 8.8 HIGH | Path Traversal through the Lookup Configuration REST API in Splunk Enterprise |
| 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-2026-76259 | 8.8 HIGH | Improper Privilege Management on the Management Port in Splunk Enterprise for Windows |
| CVE-2026-76351 | 8.8 HIGH | Server-Side Request Forgery (SSRF) through the Report Notification REST API in Splunk Secu |
| CVE-2026-76314 | 8.8 HIGH | Remote Code Execution (RCE) through Splunk Web Manager Configuration in Splunk Enterprise |
| CVE-2026-76395 | 8.8 HIGH | Remote Code Execution (RCE) through Deserialization of Untrusted Data in the Model Loading |
| CVE-2026-76316 | 8.8 HIGH | Stored SPL Injection through Deployment Server Broker Registration in Splunk Enterprise |
| CVE-2026-76352 | 8.8 HIGH | Improper Authorization through the REST API in Splunk Enterprise |
| CVE-2026-76313 | 8.8 HIGH | Remote Code Execution (RCE) through the REST API in Splunk Enterprise |
| 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-2026-76391 | 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 |
| CVE-2026-76402 | 8.2 HIGH | Server-Side Request Forgery (SSRF) through the REST API in Splunk Connect for Kafka |
Showing top 20 of 110 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same vendor: Splunk
- CVE-2026-76405
Information Disclosure through Cleartext Storage in the App - CVE-2026-76403
Improper Certificate Validation through HTTP Event Collector - CVE-2026-76402
Server-Side Request Forgery (SSRF) through the REST API in S - CVE-2026-76401
Regular Expression Denial of Service (DoS) through the REST - CVE-2026-76400
Denial of Service (DoS) through the REST API in Splunk Conne
Same weakness: CWE-502
- CVE-2026-54071
BabelDOC: Arbitrary Code Execution via CMap Pickle Deseriali - CVE-2026-77646
Server Side Request Forgery (SSRF) vulnerability reported in - CVE-2026-69836
Microsoft Entra ID Remote Code Execution Vulnerability - CVE-2026-15679
Hugging Face PyTorch Image Models checkpoint Deserialization - CVE-2026-18285
Aeon load_rehab_pile_dataset Deserialization of Untrusted Da
V. Comments for CVE-2026-76404
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