CVE-2026-8855
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IBM HTTP Server Remote Code Execution and DoS with TLS Mutual Auth

Publication date: 2026-05-26

Last updated on: 2026-05-26

Assigner: IBM Corporation

Description
IBM HTTP Server 8.5, and 9.0 is vulnerable to remote code execution and denial of service in configurations with TLS mutual authentication (client authentication).

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Meta Information

Published
2026-05-26
Last Modified
2026-05-26
Generated
2026-07-06
AI Q&A
2026-05-26
EPSS Evaluated
2026-07-04
NVD
CVE-2026-8855
EUVD
EUVD-2026-31905

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
ibm http_server From 8.5.0.0 (inc) to 8.5.5.30 (exc)
ibm http_server From 9.0.0.0 (inc) to 9.0.5.29 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

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Executive Summary

This vulnerability affects IBM HTTP Server versions 8.5 and 9.0 when configured with TLS mutual authentication (client authentication). It allows an attacker to remotely execute code or cause a denial of service on the affected server.

Impact Analysis

Exploitation of this vulnerability can lead to remote code execution, allowing an attacker to run arbitrary code on the server without authorization. It can also cause denial of service, potentially making the server unavailable to legitimate users.

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