CVE-2026-8850

IBM HTTP Server is affected by multiple vulnerabilities

HIGH
7.5
CVSS Score
Published: May 26, 2026 at 04:54 PM UTC
Updated: July 23, 2026 at 07:32 PM UTC
3 products affected across 1 vendorHTTP ServerAIXZ /os· also runs on 2 platforms

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Severity
HIGH7.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service via the optional module mod_ibm_upload.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

8.5.0 ≤ v ≤ Interim Fix 0028.5.0.0 ≤ v < 8.5.5.309.0.0.0 ≤ v < 9.0.5.298.58.5.09.09.0.0
Affected range stops below 8.5.5.30, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.0.5.29, so it looks safe — our inference, not a vendor statement
ibm-aix (environment) · ibm-z-os (environment) · linux-linux-kernel (environment) · microsoft-windows (environment)
AIX· IBMdevice
80%
All versions
80%
All versions

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

Vendor AdvisoryPatch
Source: cverecord
https://www.ibm.com/support/pages/node/7274065

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHibm
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-476

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