Detections
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IBM HTTP Server 8.5.0.0 < 8.5.5.30 / 9.0.0.0 < 9.0.5.29 Multiple Vulnerabilities (7274065)

critical Nessus Plugin ID 317395

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Synopsis

The remote web server is affected by multiple vulnerabilities.

Description

The version of IBM HTTP Server running on the remote host is affected by multiple vulnerabilities:

 - IBM HTTP Server is vulnerable to denial of service and a potential remote code execution due to improper input validation. (CVE-2026-9170)

 - IBM HTTP Server is vulnerable to remote code execution and denial of service in configurations with TLS mutual authentication (client authentication). (CVE-2026-8855)

 - IBM HTTP Server contains a buffer overflow vulnerability. A privileged user, authenticated to the Administration Server, could exploit this vulnerability to execute remote code or cause a denial of service. (CVE-2026-8834)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to IBM HTTP Server version 8.5.5.30, 9.0.5.29, or later. Alternatively, upgrade to the minimal fix pack levels required by the interim fix and then apply Interim Fix PH71265.

See Also

https://www.ibm.com/support/pages/node/7274065

Plugin Details

Severity: Critical

ID: 317395

File Name: ibm_http_server_7274065.nasl

Version: 1.3

Type: Local

Agent: unix

Family: Web Servers

Published: 5/28/2026

Updated: 6/1/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-8855

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:ibm:http_server

Required KB Items: installed_sw/IBM HTTP Server (IHS)

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/26/2026

Vulnerability Publication Date: 5/26/2026

Reference Information

CVE: CVE-2026-45186, CVE-2026-8834, CVE-2026-8835, CVE-2026-8850, CVE-2026-8852, CVE-2026-8854, CVE-2026-8855, CVE-2026-8856, CVE-2026-9170

IAVB: 2026-B-0136