CVE-2026-8856— IBM HTTP Server is affected by multiple vulnerabilities
Quick assessment
Affected
IBM HTTP Server
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 HTTP Server是美国国际商业机器（IBM）公司的一款企业级Web服务器软件。 IBM HTTP Server 8.5版本和9.0版本存在资源管理错误漏洞，该漏洞源于攻击者具有服务器配置部分写入权限时可能导致拒绝服务。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| IBM | HTTP Server | 8.5.0≤ Interim Fix 002 |
affected |
9.0 |
affected |
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I. Basic Information for CVE-2026-8856
Vulnerability Information
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Vulnerability Title
IBM HTTP Server is affected by multiple vulnerabilities
Source: CVE Program / CVE List V5
Vulnerability Description
IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service in configurations where an attacker has write access to parts of the server configuration.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/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
Vulnerability Title
IBM HTTP Server 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IBM HTTP Server是美国国际商业机器（IBM）公司的一款企业级Web服务器软件。 IBM HTTP Server 8.5版本和9.0版本存在资源管理错误漏洞，该漏洞源于攻击者具有服务器配置部分写入权限时可能导致拒绝服务。
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 | HTTP Server | 8.5.0 ~ Interim Fix 002 |
cpe:2.3:a:ibm:http_server:8.5:*:*:*:*:*:*:*
|
|
II. Public POCs for CVE-2026-8856
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-8856 (1)
Same Patch Batch · IBM · 2026-05-26 · 20 CVEs total
| CVE-2026-3660 | 9.8 CRITICAL | IBM Engineering Lifecycle Management - Jazz Foundation is vulnerable to Authentication Byp |
| CVE-2026-8633 | 9.8 CRITICAL | IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by |
| CVE-2026-8855 | 8.1 HIGH | IBM HTTP Server is affected by multiple vulnerabilities |
| CVE-2026-8834 | 8.0 HIGH | IBM HTTP Server is affected by multiple vulnerabilities |
| CVE-2026-8854 | 7.5 HIGH | IBM HTTP Server is affected by multiple vulnerabilities |
| CVE-2026-8620 | 7.5 HIGH | IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by |
| CVE-2026-8850 | 7.5 HIGH | IBM HTTP Server is affected by multiple vulnerabilities |
| CVE-2026-8835 | 7.3 HIGH | IBM HTTP Server is affected by multiple vulnerabilities |
| CVE-2026-4051 | 7.2 HIGH | IBM Engineering Lifecycle Management - Jazz Foundation is vulnerable to Server Post-Auth R |
| CVE-2026-3603 | 7.1 HIGH | IBM Engineering Lifecycle Management - Jazz Foundation is vulnerable to XML external entit |
| CVE-2025-36126 | 6.4 MEDIUM | IBM Cognos Analytics is affected by Cross-site scripting. |
| CVE-2026-8852 | 6.2 MEDIUM | IBM HTTP Server is affected by multiple vulnerabilities |
| CVE-2025-13755 | 5.5 MEDIUM | IBM® Db2® is vulnerable to credential exposure in db2diag when executing specific testcase |
| CVE-2025-36148 | 5.4 MEDIUM | IBM Financial Transaction Manager for SWIFT Services for Multiplatforms is vulnerable to c |
| CVE-2025-36145 | 5.4 MEDIUM | Multiple Vulnerabilities in watsonx.data |
| CVE-2025-14290 | 5.4 MEDIUM | IBM webMethods Integration Sever is vulnerable to server-side request forgery |
| CVE-2025-36221 | 5.3 MEDIUM | Vulnerabilities exists in IBM Cloud Pak for Data System (CPDS 1.0) - Cyclops. |
| CVE-2025-36220 | 4.3 MEDIUM | Vulnerabilities exists in IBM Cloud Pak for Data System (CPDS 1.0) - Cyclops. |
| CVE-2026-9170 | IBM HTTP Server is affected by multiple vulnerabilities |
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V. Comments for CVE-2026-8856
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