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Public proof of concept

CVE-2019-4279

A public proof of concept exists; no exploitation attested.

  • Published2019-05-17
  • WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

IBM WebSphere Application Server 8.5 and 9.0 could allow a remote attacker to execute arbitrary code on the system with a specially-crafted sequence of serialized objects from untrusted sources. IBM X-Force ID: 160445.

Timeline

dates in UTC
  1. 2019-06-05Exploit-DB entryExploit-DB

Observed activity

isMalicious corpus · updated 2026-11-03 03:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-4279?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-4279?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Ibm websphere application server
BranchAffectedFixed in
8.5≥ 8.5.0.0, ≤ 8.5.5.15no fix published
9.0≥ 9.0.0.0, ≤ 9.0.0.11no fix published
7.0= 7.0.0.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-46969
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
1 moduleexploit/windows/ibm/ibm_was_dmgr_java_deserialization_rcerank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2019-05-17
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-86jp-p2qr-pc2r

Frequently asked questions

What is CVE-2019-4279?

IBM WebSphere Application Server 8.5 and 9.0 could allow a remote attacker to execute arbitrary code on the system with a specially-crafted sequence of serialized objects from untrusted sources. IBM X-Force ID: 160445.

Is CVE-2019-4279 actively exploited?

Active exploitation of CVE-2019-4279 has not been confirmed. Its EPSS score was 79.9% on 2026-11-02, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-4279?

CVE-2019-4279 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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