CVE-2026-8644 | IBM WebSphere Application Server is affected by an identity spoofing vulnerability

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

Published: 2026-06-01 Last update: 2026-06-04 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-8644 is rated Moderate Risk (43.4/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.28%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-8644

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.05% 0.28% +0.22%
2 2026-06-07 0.04% 0.05% +0.02%
3 2026-06-02 — 0.04% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-8644

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.2 [email protected]

Weakness enumeration for CVE-2026-8644

GitHub Security Advisory for CVE-2026-8644

GHSA-6xwx-7ghh-j6w4 · Severity: critical — IBM WebSphere Application Server 9.0, and 8.5 is vulnerable to identity spoofing.

Affected software / configurations for CVE-2026-8644

Vendor Product Version Raw CPE
ibm websphere_application_server >= 8.5.0.0, < 8.5.5.30 cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:traditional:*:*:*
ibm websphere_application_server >= 9.0.0.0, < 9.0.5.29 cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:traditional:*:*:*

References for CVE-2026-8644

cvelogic Threat Intelligence