How severe is CVE-2026-8644?

CVE-2026-8644 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-8644 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-8644?

CVE-2026-8644 affects Ibm Websphere Application Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-8644?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-8644 have an EU (EUVD) identifier?

Yes. CVE-2026-8644 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33732.

When was CVE-2026-8644 published?

CVE-2026-8644 was published on 2026-06-01 and last updated on 2026-06-17.

CVE-2026-8644

CVE-2026-8644 is a critical-severity vulnerability in Ibm Websphere Application Server with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-290.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-33732
Weakness: CWE-290
Affected product: Ibm Websphere Application Server
Published: 2026-06-01
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2026-8644?: IBM WebSphere Application Server 9.0, and 8.5 is vulnerable to identity spoofing.
How severe is CVE-2026-8644?: CVE-2026-8644 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-8644 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-8644?: CVE-2026-8644 affects Ibm Websphere Application Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-8644?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-8644 have an EU (EUVD) identifier?: Yes. CVE-2026-8644 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33732.
When was CVE-2026-8644 published?: CVE-2026-8644 was published on 2026-06-01 and last updated on 2026-06-17.

References

https://www.ibm.com/support/pages/node/7274740

Affected products (1)

cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:traditional:*:*:*

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