CVE-2026-8644Network attack vector

Unauthenticated identity spoofing

Published Jun 1, 2026 · Updated Jun 1, 2026

Authentication bypass in IBM WebSphere Application Server 8.5 and 9.0 allows remote attackers to spoof an identity over the network. IBM has not published the affected authentication component, the identity source that can be forged, or the wrong operation that accepts it. The issue is reachable without credentials or user interaction, but IBM has not described the actions available to a spoofed identity.

CVSS severity9.1
Critical
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in IBM WebSphere Application Server 8.5 and 9.0 allows remote attackers to spoof an identity over the network. IBM has not published the affected authentication component, the identity source that can be forged, or the wrong operation that accepts it. The issue is reachable without credentials or user interaction, but IBM has not described the actions available to a spoofed identity.

The record

CVE
CVE-2026-8644
Published
Jun 1, 2026
Updated
Jun 1, 2026
Vendor
OpenBMC Project
Product
IBM WebSphere Application Server
Classifications
CWE-290, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.5
  2. Affected versionversion=9.0 <=1.1.9.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenBMC Project · IBM WebSphere Application Serverversion=8.5; version=9.0 <=1.1.9.12

Published CVSS scores

9.1IBM CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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