Auth bypass in widely used IBM WebSphere Application Server (8.5/9.0) enabling remote unauthenticated access; enterprise-impacting and newsworthy.
CVE-2026-93907
Auth bypass in IBM WebSphere CSIv2 inbound handler allows remote unauthenticated access.
Is CVE-2026-93907 being exploited?
Not confirmed. CVE-2026-93907 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 0.34% probability of exploitation in the next 30 days.
How severe is CVE-2026-93907?
CVE-2026-93907 is rated High with a CVSS score of 8.1. 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-2026-93907?
Yes. A fix has been recorded for CVE-2026-93907. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-93907 affect?
CVE-2026-93907 affects IBM WebSphere Application Server 8.5, IBM WebSphere Application Server 9.0. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-93907?
Apply IBM advisory patch immediately; restrict/disable CSIv2 and block inbound access until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote authentication bypass via CSIv2 inbound propagation handler, enabling unauthenticated access to WebSphere management/APIs and potential unauthorized data/configuration access.
Immediate action required
- affected8.5
- affected9.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.