CVE-2026-8834
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IBM HTTP Server Buffer Overflow Vulnerability

Vulnerability report for CVE-2026-8834, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-05-26

Last updated on: 2026-05-26

Assigner: IBM Corporation

Description

IBM HTTP Server 8.5, and 9.0 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.

CVSS Scores

EPSS Scores

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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
EUVD

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)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

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Compliance Impact

The vulnerability in IBM HTTP Server 8.5 and 9.0 is a buffer overflow that allows a privileged, authenticated user to execute remote code or cause a denial of service. This can lead to a compromise of confidentiality, integrity, and availability, as indicated by the CVSS score with high impact on all three.

Such a compromise can affect compliance with common standards and regulations like GDPR and HIPAA, which require protection of data confidentiality and integrity, as well as ensuring availability of services. Exploitation of this vulnerability could lead to unauthorized data access or service disruption, potentially resulting in non-compliance with these regulations.

Mitigation Strategies

The vulnerability affects IBM HTTP Server versions 8.5 and 9.0 and allows a privileged, authenticated user to execute remote code or cause a denial of service.

Although no direct mitigation steps for CVE-2026-8834 are provided, similar IBM HTTP Server vulnerabilities are mitigated by applying interim fixes or upgrading to later Fix Packs.

It is recommended to monitor IBM support for patches or interim fixes specific to this vulnerability and apply them promptly once available.

Executive Summary

This vulnerability is a buffer overflow issue found in IBM HTTP Server versions 8.5 and 9.0. It can be exploited by a privileged user who is authenticated to the Administration Server. Exploiting this vulnerability could allow the attacker to execute remote code or cause a denial of service.

Impact Analysis

If exploited, this vulnerability can have severe impacts including remote code execution and denial of service. This means an attacker with privileged access could take control of the affected server or disrupt its availability, potentially leading to system compromise or downtime.

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EPSS Chart