CVE-2026-8856: CWE-400 Uncontrolled Resource Consumption in IBM HTTP Server
IBM HTTP Server versions 8.5.0 and 9.0 contain a vulnerability classified as CWE-400 (Uncontrolled Resource Consumption) that can lead to denial of service. This issue arises in configurations where an attacker has write access to parts of the server configuration, potentially allowing them to exhaust server resources. The vulnerability has a high severity rating with a CVSS score of 7.7. No official patch or remediation guidance is currently provided by IBM, and no known exploits are reported in the wild.
AI Analysis
Technical Summary
CVE-2026-8856 affects IBM HTTP Server versions 8.5.0 and 9.0. The vulnerability is due to uncontrolled resource consumption (CWE-400) that can be triggered when an attacker has write access to certain server configuration components. This can result in a denial of service condition by exhausting server resources. The CVSS 3.1 base score is 7.7, indicating high severity, with an attack vector requiring local access (AV:L), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), no confidentiality impact (C:N), high integrity impact (I:H), and high availability impact (A:H). There is no vendor advisory or patch information available at this time.
Potential Impact
Successful exploitation can cause denial of service by exhausting resources on IBM HTTP Server 8.5.0 and 9.0 when an attacker has write access to server configuration files. This impacts the integrity and availability of the server. There is no confidentiality impact reported. No known exploits are currently observed in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict write access to server configuration files to trusted administrators only to prevent exploitation. Monitor for any updates from IBM regarding patches or mitigations.
CVE-2026-8856: CWE-400 Uncontrolled Resource Consumption in IBM HTTP Server
Description
IBM HTTP Server versions 8.5.0 and 9.0 contain a vulnerability classified as CWE-400 (Uncontrolled Resource Consumption) that can lead to denial of service. This issue arises in configurations where an attacker has write access to parts of the server configuration, potentially allowing them to exhaust server resources. The vulnerability has a high severity rating with a CVSS score of 7.7. No official patch or remediation guidance is currently provided by IBM, and no known exploits are reported in the wild.
CVSS v3.1
Score 7.7high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-8856 affects IBM HTTP Server versions 8.5.0 and 9.0. The vulnerability is due to uncontrolled resource consumption (CWE-400) that can be triggered when an attacker has write access to certain server configuration components. This can result in a denial of service condition by exhausting server resources. The CVSS 3.1 base score is 7.7, indicating high severity, with an attack vector requiring local access (AV:L), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), no confidentiality impact (C:N), high integrity impact (I:H), and high availability impact (A:H). There is no vendor advisory or patch information available at this time.
Potential Impact
Successful exploitation can cause denial of service by exhausting resources on IBM HTTP Server 8.5.0 and 9.0 when an attacker has write access to server configuration files. This impacts the integrity and availability of the server. There is no confidentiality impact reported. No known exploits are currently observed in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict write access to server configuration files to trusted administrators only to prevent exploitation. Monitor for any updates from IBM regarding patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-05-18T16:50:49.167Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a15e03f891d628fdc67da10
Added to database: 05/26/2026, 18:02:39 UTC
Last enriched: 06/02/2026, 21:21:16 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 73
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