CVE-2026-76286— Server-Side Request Forgery (SSRF) through Custom API Tools in Splunk MCP Server
Quick assessment
Affected
Splunk Splunk MCP Server
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.
在 Splunk MCP Server 版本低于 1.2.1 的情况下，当用户运行自定义应用程序编程接口（API）工具时，Splunk MCP Server 可能会将该用户的 Splunk 平台身份验证令牌发送至为该校准工具配置的 URL。如果另一用户控制了该 URL，则他们可以捕获该令牌，并利用该令牌以执行工具的用户身份访问数据并执行操作。 成功利用此漏洞需要一名具备包含 能力（capability）角色的用户，能够运行由其他用户配置的自定义 API 工具。 有关更多信息，请参阅 Splunk 文档中的“配置 S
Possible ATT&CK Techniques 3 AI
T1078.004 · Cloud Accounts T1059 · Command and Scripting Interpreter T1552.004 · Private Keys
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I. Basic Information for CVE-2026-76286
Vulnerability Information
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Vulnerability Title
Server-Side Request Forgery (SSRF) through Custom API Tools in Splunk MCP Server
Source: CVE Program / CVE List V5
Vulnerability Description
In Splunk MCP Server versions below 1.2.1, Splunk MCP Server could send the Splunk platform authentication token of a user who runs a custom Application Programming Interface (API) tool to the URL configured for that tool. If another user controls that URL, they could capture the token and use it to access data and perform actions as the user who ran the tool. Successful exploitation requires a user who holds a role that contains the mcp_tool_execute capability to run a custom API tool configured by another user. For more information see Configure the Splunk MCP Server (https://help.splunk.com/en/splunk-enterprise/mcp-server-for-splunk-platform/1.2/configure-the-splunk-mcp-server) and Managing custom tools in Splunk MCP Server (https://help.splunk.com/en/splunk-enterprise/mcp-server-for-splunk-platform/1.2/managing-custom-tools-in-splunk-mcp-server) in the Splunk documentation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Splunk | Splunk MCP Server | 1.2 ~ 1.2.1 | - |
|
II. Public POCs for CVE-2026-76286
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-76286 (1)
Same Patch Batch · Splunk · 2026-10-07 · 23 CVEs total
| CVE-2026-76268 | 9.8 CRITICAL | Missing Authentication for Critical Function in the Patroni REST API in Splunk Enterprise |
| CVE-2026-76266 | 7.7 HIGH | Local Privilege Escalation through Linux Package Upgrades in Splunk Enterprise |
| CVE-2026-76265 | 6.5 MEDIUM | Improper Access Control through REST API Endpoints in Splunk Secure Gateway |
| CVE-2026-76274 | 6.5 MEDIUM | Server-Side Request Forgery (SSRF) through the REST API in Splunk App for Splunk Observabi |
| CVE-2026-76269 | 6.5 MEDIUM | Improper Access Control in Search Job Retrieval through the REST API in Splunk Enterprise |
| CVE-2026-76270 | 6.5 MEDIUM | Structured Query Language (SQL) Injection in the SPL2 Module Catalog in Splunk Enterprise |
| CVE-2026-76271 | 6.5 MEDIUM | Denial of Service (DoS) in the Discover Splunk Observability Cloud app for Splunk Enterpri |
| CVE-2026-76280 | 6.3 MEDIUM | Incorrect Permission Assignment for App Key Value Store Collections in Splunk Secure Gatew |
| CVE-2026-76278 | 4.3 MEDIUM | Authorization Bypass in SPL2 Module Permissions in Splunk Enterprise |
| CVE-2026-76272 | 4.3 MEDIUM | Missing Access Control through the REST API in Splunk Secure Gateway |
| CVE-2026-76267 | 4.3 MEDIUM | Log Injection through the REST API in Splunk App for Splunk O11y Cloud |
| CVE-2026-76264 | 4.3 MEDIUM | Improper Authorization through the REST API in Splunk Enterprise |
| CVE-2026-76276 | 4.3 MEDIUM | Information Disclosure in the Discover Splunk Observability Cloud app through Splunk Web f |
| CVE-2026-76275 | 4.3 MEDIUM | Improper Authorization in Search Job Listings through the REST API in Splunk Enterprise |
| CVE-2026-76273 | 4.3 MEDIUM | Improper Input Validation through the collect Command in Splunk Enterprise |
| CVE-2026-76279 | 4.3 MEDIUM | Improper Input Validation of Index Names through the collect Command in Splunk Enterprise |
| CVE-2026-76277 | 4.1 MEDIUM | Improper Input Validation of Native Splunk Usernames through the REST API in Splunk Enterp |
| CVE-2026-76281 | Improper Access Control in Splunk Enterprise | |
| CVE-2026-76284 | Improper Neutralization in Splunk Enterprise | |
| CVE-2026-76283 | Protection Mechanism Failure in Splunk Enterprise |
Showing top 20 of 23 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same vendor: Splunk
-
CVE-2026-76285
Improper Adherence to Coding Standards in Splunk Enterprise -
CVE-2026-76284
Improper Neutralization in Splunk Enterprise -
CVE-2026-76283
Protection Mechanism Failure in Splunk Enterprise -
CVE-2026-76282
Improper Control of a Resource Through its Lifetime in Splun -
CVE-2026-76281
Improper Access Control in Splunk Enterprise
Same weakness: CWE-918
-
CVE-2026-76274
Server-Side Request Forgery (SSRF) through the REST API in S -
CVE-2026-20362
Cisco Finesse Server-Side Request Forgery Vulnerability -
CVE-2026-107273
Gophish 0.11.0 through 0.12.1 SSRF via POST /api/import/site -
CVE-2026-102255
华为SMA1000 SSRF漏洞 -
CVE-2026-106032
Server-side request forgery and local file read via unrestri
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