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CVE-2026-76271— Denial of Service (DoS) in the Discover Splunk Observability Cloud app for 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 10.4.3、10.2.7 和 10.0.10 以下版本中，不具有“admin”或“power”Splunk 角色的低权限用户可能导致 Splunk Observability Cloud 应用的“Discover Splunk Observability Cloud”REST API 端点发生拒绝服务（DoS）攻击。该漏洞是由于该应用使用低效的正则表达式来验证通过该端点提交的输入所导致。 如需了解更多信息，请参阅 Splunk 文档中的以下部分： 关于基于角色的用户访问配置

CVSS 6.5 · Medium
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I. Basic Information for CVE-2026-76271

Vulnerability Information
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Vulnerability Title
Denial of Service (DoS) in the Discover Splunk Observability Cloud app for Splunk Enterprise
Source: CVE Program / CVE List V5
Vulnerability Description
In Splunk Enterprise versions below 10.4.3, 10.2.7, and 10.0.10, a low-privileged user that does not hold the "admin" or "power" Splunk roles could cause a denial of service against a Representational State Transfer (REST) API endpoint in the Discover Splunk Observability Cloud app. The vulnerability is possible because the app uses an inefficient regular expression to validate input submitted through the endpoint. For more information see About configuring role-based user access (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.4/manage-splunk-platform-users-and-roles/about-configuring-role-based-user-access), Splunk Observability Cloud previews (https://help.splunk.com/en/splunk-enterprise/search/search-manual/10.4/observability/splunk-observability-cloud-previews), and restmap.conf (https://help.splunk.com/en/splunk-enterprise/administer/admin-manual/10.4/configuration-file-reference/10.4.0-configuration-file-reference/restmap.conf) in the Splunk documentation. Splunk Enterprise versions 9.4.x are not affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Splunk Splunk Enterprise 10.4 ~ 10.4.3 -

II. Public POCs for CVE-2026-76271

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III. Intelligence Information for CVE-2026-76271

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Other References for CVE-2026-76271 (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-2026-76280 6.3 MEDIUM Incorrect Permission Assignment for App Key Value Store Collections in Splunk Secure Gatew
CVE-2026-76286 5.3 MEDIUM Server-Side Request Forgery (SSRF) through Custom API Tools in Splunk MCP Server
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 product: Splunk Enterprise
Same vendor: Splunk
Same weakness: CWE-407

V. Comments for CVE-2026-76271

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