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CVE-2026-2311— IBM i is affected by a privilege escalation vulnerability in Web Administration GUI []

Quick assessment

Affected
IBM i
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.

IBM i是美国国际商业机器（IBM）公司的一套运行在IBM Power Systems和IBM PureSystems中的操作系统。 IBM i 7.6版本、7.5版本、7.4版本、7.3版本和7.2版本存在访问控制错误漏洞，该漏洞源于Web Administration GUI授权检查无效，可能导致权限提升，允许恶意行为者以管理员权限运行用户控制的代码。

CVSS 6.4 · Medium EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 5

VendorProduct Version RangeStatus
IBM i 7.6.0≤ 2.3.0 affected
7.5.0 affected
7.4.0 affected
7.3.0 affected
7.2.0 affected
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I. Basic Information for CVE-2026-2311

Vulnerability Information
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Vulnerability Title
IBM i is affected by a privilege escalation vulnerability in Web Administration GUI []
Source: CVE Program / CVE List V5
Vulnerability Description
IBM i 7.6, 7.5, 7.4, 7.3, and 7.2 s vulnerable to privilege escalation caused by an invalid IBM i Web Administration GUI authorization check.  A malicious actor could cause user-controlled code to run with administrator privilege.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
IBM i 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IBM i是美国国际商业机器（IBM）公司的一套运行在IBM Power Systems和IBM PureSystems中的操作系统。 IBM i 7.6版本、7.5版本、7.4版本、7.3版本和7.2版本存在访问控制错误漏洞，该漏洞源于Web Administration GUI授权检查无效，可能导致权限提升，允许恶意行为者以管理员权限运行用户控制的代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
IBM i 7.6.0 ~ 2.3.0 cpe:2.3:a:ibm:i:7.6.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-2311

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III. Intelligence Information for CVE-2026-2311

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Vendor Advisories for CVE-2026-2311 (1)

Same Patch Batch · IBM · 2026-04-30 · 14 CVEs total

CVE-2026-6389 8.8 HIGH IBM Turbonomic Prometurbo agent used by IBM Turbonomic Application Resource Management is
CVE-2026-6543 8.8 HIGH Authenticated Remote Code Execution Vulnerability in Langflow Code Validation Endpoint
CVE-2026-4503 7.5 HIGH Unauthenticated Insecure Direct Object Reference (IDOR) Vulnerability in Langflow Desktop
CVE-2026-1577 6.5 MEDIUM IBM® Db2® is vulnerable to a denial of service with a specially crafted query involving mu
CVE-2025-36122 6.5 MEDIUM IBM® Db2® is vulnerable to a denial of service with a specially crafted query when stmthea
CVE-2026-6542 6.5 MEDIUM Monitor API allows cross-user read of transaction logs and deletion of build data via flow
CVE-2026-3345 6.5 MEDIUM Path Traversal and Arbitrary File Write Vulnerability in IBM Langflow Desktop API v2 File
CVE-2026-3340 6.5 MEDIUM Server-Side Request Forgery (SSRF) in Langflow URL Component
CVE-2026-4502 6.5 MEDIUM Arbitrary File Write and Remote Code Execution Vulnerability in Langflow v2 API
CVE-2026-3346 6.4 MEDIUM Stored Cross-Site Scripting (XSS) in Langflow Markdown Rendering via rehypeRaw
CVE-2025-36335 6.2 MEDIUM Vulnerabilities found
CVE-2025-14688 5.3 MEDIUM IBM® Db2® is vulnerable to a denial of service when fetching from certain tables under spe
CVE-2025-36180 5.3 MEDIUM Inadequate Pod Communication Restrictions, affects watsonx.data

IV. Related Vulnerabilities

Same product: i
Same vendor: IBM
Same weakness: CWE-284

V. Comments for CVE-2026-2311

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