Denial of Service Vulnerability in IBM HTTP Server 8.5 and 9.0
CVE-2026-8850

7.5HIGH

Key Information:

Vendor

IBM
Status
Http Server
Vendor
CVE Published:
26 May 2026

What is CVE-2026-8850?

IBM HTTP Server versions 8.5 and 9.0 are vulnerable to a denial of service attack through the optional mod_ibm_upload module. An attacker can exploit this vulnerability to disrupt service availability, potentially leading to unplanned downtime and loss of access to resources for users. Organizations utilizing these versions should review their configurations and apply the necessary patches recommended by IBM to mitigate this risk.

Affected Version(s)

HTTP Server 8.5.0

HTTP Server 9.0

References

https://www.ibm.com/support/pages/node/7274065
vendor-advisorypatch

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.