CVE-2026-76266— Local Privilege Escalation through Linux Package Upgrades 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 版本低于 10.4.3、10.2.7、10.0.10 和 9.4.15 的 Linux 系统中，若本地用户能够以运行 Splunk Enterprise 的用户身份执行命令，则可能导致受影响的 Linux 软件包升级时，以 root 权限执行攻击者控制的操作系统命令。该漏洞的成因在于，Linux 软件包维护脚本在执行以 root 权限进行的升级操作时，信任已有的 Splunk Enterprise 安装内容。只有在本地用户修改了安装内容后，且随后发生受影响的 Linux 软件
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2026-76266
Vulnerability Information
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Vulnerability Title
Local Privilege Escalation through Linux Package Upgrades in Splunk Enterprise
Source: CVE Program / CVE List V5
Vulnerability Description
In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15 on Linux, a local user who can run commands as the user account running Splunk Enterprise could cause an affected Linux package upgrade to run attacker-controlled operating-system commands with root privileges. The vulnerability is possible because the Linux package maintainer script trusts existing Splunk Enterprise installation content when it performs upgrade operations with root privileges. The vulnerability requires an affected Linux package upgrade to occur after the local user modifies the installation. The local user should not be able to elevate privileges at will.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
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-2026-76266
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-76266 (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-2026-76265 | 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-2026-76286 | 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
-
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 vendor: Splunk
-
CVE-2026-76285
Improper Adherence to Coding Standards in Splunk Enterprise -
CVE-2026-76286
Server-Side Request Forgery (SSRF) through Custom API Tools -
CVE-2026-76283
Protection Mechanism Failure in Splunk Enterprise -
CVE-2026-76284
Improper Neutralization in Splunk Enterprise -
CVE-2026-76281
Improper Access Control in Splunk Enterprise
Same weakness: CWE-269
-
CVE-2026-46434
wger: Trainer Privilege Escalation - Improper Privilege Mana -
CVE-2026-106492
Backstage: Improper preservation of access restrictions duri -
CVE-2026-106296
Chrome Mac <155.0.8059.39 特权管理不当漏洞 -
CVE-2026-67269
Dell CSM Operator <1.18.0 权限提升漏洞 -
CVE-2026-105688
Penpot: Team admin can escalate to owner via team invitation
V. Comments for CVE-2026-76266
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