Read the docs
TI-2026-73525 Aliases CVE-2026-93895GHSA-3r8m-rjq2-w53r

Access control bypass in IBM WebSphere Application Server Liberty

Priority MEDIUM 41CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284.

Summary

IBM WebSphere Application Server Liberty from 20.0.0.12 through 26.0.0.10 is affected. Improper access control (CWE-284) lets an attacker bypass access controls configured on gRPC service methods. An unauthenticated remote attacker can do this over the network without credentials and can read or change protected data.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

IBM WebSphere Application Server - Liberty 20.0.0.12 through 26.0.0.10 could allow an unauthenticated remote attacker to bypass access controls configured on gRPC service methods.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00394 33rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
IBMWebSphere Application Server - Liberty20.0.0.12 – 26.0.0.10—No fix listedCNA
  • WebSphere Application Server - Liberty VendorIBM Affected 20.0.0.12 – 26.0.0.10 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:liberty:*:*:*20.0.0.12 to before 26.0.0.11VulnerableIBM
  • cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:liberty:*:*:* Versions 20.0.0.12 to before 26.0.0.11 Vulnerable ·IBM

Remediation

No fixed version is listed for IBM WebSphere Application Server Liberty.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    IBM WebSphere Application Server - Liberty — ibm.com/support/pages/node/7292228

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-73535 Incorrect authorization in IBM WebSphere Application Server LibertyPriority MEDIUM 41
    • TI-2026-73536 IBM WebSphere Application Server Liberty denial of servicePriority LOW 39
    Show all 3 records → Advisory →

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-93895
  2. 2026-10-13 Alias added: GHSA-3r8m-rjq2-w53r
  3. 2026-10-18 CISA SSVC decision points changed

References

Patch 1

  • TI-2015-06198 Serialized-object interfaces in certain IBM analytics, business solutions, cognitive, IT… KEVCVSS 3.1CRITICAL 9.8
  • TI-2010-00403 modules/arch/win32/mod_isapi.c in mod_isapi in the Apache HTTP Server 2.0.37 through… CVSS 2.0HIGH 10.0
  • TI-2019-03185 Deserialization of untrusted data in IBM WebSphere Application Server CVSS 3.1CRITICAL 9.8
  • TI-2020-03809 Deserialization of untrusted data in IBM WebSphere Application Server CVSS 3.1CRITICAL 9.8
  • TI-2025-24648 IBM WebSphere Application Server code execution CVSS 3.1CRITICAL 9.8
  • TI-2020-03807 Deserialization of untrusted data in IBM WebSphere Application Server CVSS 3.1CRITICAL 9.8
See all 502 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences