Read the docs
TI-2018-01628 Aliases CVE-2018-1851GHSA-mv84-hf34-fgc6

Deserialization of untrusted data in IBM WebSphere Application Server

Priority MEDIUM 49CWE-502Published · Updated

Key facts

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

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-502.

Summary

IBM WebSphere Application Server Liberty OpenID Connect could allow a remote attacker to execute arbitrary code on the system, caused by improper deserialization. By sending a specially-crafted request to the RP service, an attacker could exploit this vulnerability to execute arbitrary code. IBM X-Force ID: 150999.

Why it matters now

EPSS 0.03872 90th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
IBMWebSphere Application ServerLiberty—No fix listedCNA
  • WebSphere Application Server VendorIBM Affected Liberty Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:liberty:*:*:*before 18.0.0.3VulnerableIBM
  • cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:liberty:*:*:* Versions before 18.0.0.3 Vulnerable ·IBM

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-1851
  2. 2026-10-03 Alias added: GHSA-mv84-hf34-fgc6
  3. 2026-10-14 EPSS moved to the 90th–95th percentile

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