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CVE-2026-76252— Cross-Site Scripting (XSS) through Splunk Web Message Validation in Splunk Enterprise

Quick assessment

Affected
Splunk Splunk Enterprise
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 Enterprise 低于 10.4.2、10.2.6、10.0.9 和 9.4.13 的版本中，未授权攻击者可通过诱骗受害者用户访问恶意网页，在该用户的浏览器中执行未经授权的 JavaScript 代码。这可能导致攻击者非法访问该用户可访问的所有相关数据，并执行影响系统完整性的操作。 此跨站脚本（XSS）漏洞的成因在于：Splunk Web 未对页面消息处理程序所接收消息的来源和上下文进行有效验证。该漏洞要求攻击者通过钓鱼手段，诱使受影响用户在浏览器中主动发起请求。未授权攻击者无法随意利用该漏洞

CVSS 6.8 · Medium EPSS 0.18% · P8

Affected Version Matrix 4

VendorProduct Version RangeStatus
Splunk Splunk Enterprise 10.4< 10.4.2 affected
10.2< 10.2.6 affected
10.0< 10.0.9 affected
9.4< 9.4.13 affected
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I. Basic Information for CVE-2026-76252

Vulnerability Information
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Vulnerability Title
Cross-Site Scripting (XSS) through Splunk Web Message Validation in Splunk Enterprise
Source: CVE Program / CVE List V5
Vulnerability Description
In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.13, an unauthenticated user who tricks another user into visiting a malicious web page could run unauthorized JavaScript in that user's browser. This could allow for unauthorized access to all relevant data available to that user and actions that affect system integrity. The Cross-Site Scripting (XSS) is possible because Splunk Web does not validate the origin and source of messages received by a page message handler. The vulnerability requires the attacker to phish the affected user by tricking them into initiating a request within their browser. The unauthenticated user should not be able to exploit the vulnerability at will.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Splunk Splunk Enterprise 10.4 ~ 10.4.2 -

II. Public POCs for CVE-2026-76252

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III. Intelligence Information for CVE-2026-76252

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

CVE-2026-76312 9.4 CRITICAL Improper Access Control through Embedded Reports in Splunk Enterprise
CVE-2026-76311 9.4 CRITICAL Improper Access Control in Embedded Report Dispatch Archives 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-2026-76253 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-2026-76313 8.8 HIGH Remote Code Execution (RCE) through the REST API in Splunk Enterprise
CVE-2026-76316 8.8 HIGH Stored SPL Injection through Deployment Server Broker Registration in Splunk Enterprise
CVE-2026-76314 8.8 HIGH Remote Code Execution (RCE) through Splunk Web Manager Configuration 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-2026-76319 8.8 HIGH Remote Code Execution (RCE) through Federated Search 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-2026-76259 8.8 HIGH Improper Privilege Management on the Management Port in Splunk Enterprise for Windows
CVE-2026-76395 8.8 HIGH Remote Code Execution (RCE) through Deserialization of Untrusted Data in the Model Loading
CVE-2026-76350 8.8 HIGH Improper Privilege Management through PDF Attachments for Email Alert Actions in Splunk En
CVE-2026-76351 8.8 HIGH Server-Side Request Forgery (SSRF) through the Report Notification REST API in Splunk Secu
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 Enterprise
Same vendor: Splunk
Same weakness: CWE-79

V. Comments for CVE-2026-76252

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