Affects widely deployed enterprise app server (IBM WebSphere Liberty). Auth bypass can expose corporate apps and admin access across many organizations.
CVE-2026-93909
Auth bypass in IBM WebSphere Liberty when samlWeb-2.0 is enabled.
Is CVE-2026-93909 being exploited?
Not confirmed. CVE-2026-93909 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.35% probability of exploitation in the next 30 days.
How severe is CVE-2026-93909?
CVE-2026-93909 is rated Critical with a CVSS score of 9.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-93909?
Not known from our data. No patch reference has been recorded for CVE-2026-93909, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-93909 affect?
CVE-2026-93909 affects IBM WebSphere Liberty 17.0.0.3 through 26.0.0.10 with samlWeb-2.0 enabled. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-93909?
Disable samlWeb-2.0 if possible; apply IBM fix when published and restrict access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authentication bypass via SAML allows unauthorized access and user impersonation, potentially exposing sensitive apps and admin functions.
Immediate action required