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Verification
VERIFIEDConfidence: HIGH
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Fact-check summary

Verified by quality watch 2026-10-13 8:27 PM AST against CVE.org (IBM CNA, both CVSS 3.1 9.1), NVD (Received, no NVD score) and IBM bulletins 7292228 and 7292236. NUM hold was a false positive (parser garbled version list). Replaced filler paragraphs with bulletin detail (features, APARs, Fix Pack 26.0.0.11 Q4 2026, companion CVEs).

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Home/Tech/IBM fixes two critical flaws in Liberty variant of WebSphere Application Server
VERIFIEDBy Xavier Rivera· ·1 min read

IBM fixes two critical flaws in Liberty variant of WebSphere Application Server

IBM rates two WebSphere Liberty flaws 9.1: a gRPC access-control bypass (CVE-2026-93895) and a samlWeb-2.0 authentication bypass (CVE-2026-93909). Interim fixes are available now; Fix Pack 26.0.0.11 is targeted for Q4 2026.

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IBM fixes two critical flaws in Liberty variant of WebSphere Application Server
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TL;DRAI · 60 sec read

IBM disclosed two critical WebSphere Application Server Liberty flaws, each rated 9.1 by IBM. CVE-2026-93895 bypasses gRPC access controls (20.0.0.12 to 26.0.0.10) and CVE-2026-93909 is a SAML authentication bypass (17.0.0.3 to 26.0.0.10). Interim fixes are out; Fix Pack 26.0.0.11 is due in Q4 2026.

IBM has disclosed two critical vulnerabilities in WebSphere Application Server Liberty, each of which can let an unauthenticated attacker get around security controls when a specific feature is enabled.

IBM rates both flaws 9.1 (critical). The scores come from IBM, the CVE numbering authority, under CVSS 3.1, with a network attack vector, no privileges and no user interaction. NVD has received both records but has not yet published its own scores.
The issues permit unauthenticated remote attackers to bypass access controls.

CVE-2026-93895 affects gRPC. It lets an unauthenticated remote attacker bypass access controls configured on gRPC service methods. It affects Liberty 20.0.0.12 through 26.0.0.10 with the grpc-1.0 feature enabled. IBM's bulletin also lists two lower-rated flaws fixed alongside it, CVE-2026-95695 (7.4) and CVE-2026-95696 (6.5).
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CVE-2026-93909 affects SAML sign-in. IBM describes it as an authentication bypass, classed as session fixation, when the samlWeb-2.0 feature is enabled. It affects Liberty 17.0.0.3 through 26.0.0.10.

How to fix it. IBM recommends applying the interim fixes for APAR DT502929 (gRPC) and APAR DT502359 (SAML) now, or moving to Liberty Fix Pack 26.0.0.11 or later, which IBM targets for the fourth quarter of 2026. IBM lists no workarounds for either flaw.
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Who should check. Only servers with grpc-1.0 or samlWeb-2.0 enabled are affected. IBM's bulletins link to a guide for checking which features a Liberty server uses.
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