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CVE-2026-8644

IBM Websphere Application Server authentication bypass

9.1 CRITICALEPSS 0.47%
  1. Published1 Jun 2026

Description

IBM WebSphere Application Server 9.0, and 8.5 is vulnerable to identity spoofing.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products

IBM Websphere Application Server≥ 8.5.0.0 < 8.5.5.30 · ≥ 9.0.0.0 < 9.0.5.29

Remediation

Fixed in
IBM Websphere Application Server≥ 8.5.5.30

References

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Frequently asked

Is CVE-2026-8644 being actively exploited?

CVE-2026-8644 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.47%.

How severe is CVE-2026-8644?

CVE-2026-8644 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.47% probability of exploitation.

Which products are affected by CVE-2026-8644?

Affected products include IBM Websphere Application Server.

How do I fix CVE-2026-8644?

Upgrade affected software to a fixed version, for example IBM Websphere Application Server 8.5.5.30 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-8644 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.