CVE-2026-76288— Denial of Service (DoS) through Splunk Web Content-Type Header Parsing 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 10.4.4、10.2.8、10.0.11 和 9.4.16 以下的版本中，未认证用户可以向 Splunk Web 的 JavaScript 日志记录端点发送单个特制请求，导致 Splunk Web 停止响应任何请求。在重启 Splunk Enterprise 之前，Splunk Web 将一直处于不可用状态。 该漏洞产生的原因是：Splunk Web 在处理请求之前，未对请求头解析进行限制。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-76288
Vulnerability Information
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Vulnerability Title
Denial of Service (DoS) through Splunk Web Content-Type Header Parsing in Splunk Enterprise
Source: CVE Program / CVE List V5
Vulnerability Description
In Splunk Enterprise versions below 10.4.4, 10.2.8, 10.0.11, and 9.4.16, an unauthenticated user could send a single crafted request to the Splunk Web JavaScript logger endpoint and cause Splunk Web to stop responding to requests. Splunk Web remains unavailable until Splunk Enterprise is restarted.
The vulnerability is possible because Splunk Web does not limit request-header parsing before processing the request.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Splunk | Splunk Enterprise | 10.4 ~ 10.4.4 | - |
|
II. Public POCs for CVE-2026-76288
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-76288 (1)
Same Patch Batch · Splunk · 2026-10-21 · 31 CVEs total
| CVE-2026-76291 | 8.8 HIGH | Improper Access Control through Scheduled Search Safeguards in Splunk Enterprise |
| CVE-2026-76298 | 8.8 HIGH | Use of Hard-coded Cryptographic Key in the PostgreSQL Sidecar Service in Splunk Enterprise |
| CVE-2026-76306 | 7.5 HIGH | Information Disclosure through REST API Query Filters in Splunk SOAR |
| CVE-2026-76290 | 7.5 HIGH | Denial of Service (DoS) through Unauthenticated Package Downloads over the REST API in Spl |
| CVE-2026-76307 | 7.2 HIGH | Sensitive Information Disclosure through REST API Query Filters in Splunk SOAR |
| CVE-2026-76293 | 7.2 HIGH | Remote Code Execution (RCE) through Splunk Web Manager Extensible Markup Language (XML) in |
| CVE-2026-76289 | 6.5 MEDIUM | Denial of Service (DoS) through the REST API in Splunk Enterprise |
| CVE-2026-76305 | 6.5 MEDIUM | Improper Access Control during App Downloads in Splunk SOAR |
| CVE-2026-76292 | 6.5 MEDIUM | Missing Authorization through REST API Endpoints in Splunk Secure Gateway |
| CVE-2026-76308 | 6.5 MEDIUM | Missing Authorization through the REST API in Splunk SOAR |
| CVE-2026-76406 | 5.9 MEDIUM | Information Disclosure through REST API Authentication in Splunk SOAR |
| CVE-2026-76303 | 5.7 MEDIUM | Stored Cross-Site Scripting (XSS) through App Documentation in Splunk SOAR |
| CVE-2026-76287 | 5.4 MEDIUM | Authorization Bypass in the Data Management REST API in Splunk Enterprise |
| CVE-2026-76296 | 4.3 MEDIUM | Missing Authorization through Sourcetype Renaming in Splunk Web for Splunk Enterprise |
| CVE-2026-76295 | 4.3 MEDIUM | SPL Injection through the REST API in Splunk Secure Gateway |
| CVE-2026-76304 | 4.3 MEDIUM | Sensitive Information Disclosure through Automation Broker Configuration in Splunk SOAR |
| CVE-2026-76294 | 4.3 MEDIUM | Improper Access Control in Field Extraction Management in Splunk Enterprise |
| CVE-2026-76297 | 4.2 MEDIUM | Federated Search Provider State Change through Cross-Site Request Forgery (CSRF) in Splunk |
| CVE-2026-76526 | Improper Neutralization in Splunk SOAR | |
| CVE-2026-76302 | Security Hardening in Splunk Enterprise - October 2026 |
Showing top 20 of 31 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Splunk Enterprise
-
CVE-2026-76302
Security Hardening in Splunk Enterprise - October 2026 -
CVE-2026-76301
Security Hardening in Splunk Enterprise - October 2026 -
CVE-2026-76300
Security Hardening in Splunk Enterprise - October 2026 -
CVE-2026-76299
Security Hardening in Splunk Enterprise - October 2026 -
CVE-2026-76298
Use of Hard-coded Cryptographic Key in the PostgreSQL Sideca
Same vendor: Splunk
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CVE-2026-76531
Files or Directories Accessible to External Parties in Splun -
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Improper Protection of Alternate Path in Splunk SOAR -
CVE-2026-76528
Protection Mechanism Failure in Splunk SOAR -
CVE-2026-76527
Improper Check or Handling of Exceptional Conditions in Splu
Same weakness: CWE-400
-
CVE-2026-76290
Denial of Service (DoS) through Unauthenticated Package Down -
CVE-2026-96636
Pillow: Decompression-bomb protection bypass via multi-frame -
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Pillow PDF append accepts malformed shared page-tree DAG cau -
CVE-2026-96637
Pillow: Decompression bomb check bypass in SpiderImagePlugin -
CVE-2026-96638
Pillow: BMP RLE decoder memory-amplification DoS via unbound
V. Comments for CVE-2026-76288
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