CVE-2026-84418Network attack vector

Token theft via forged TLS certificates

Published Oct 12, 2026 · Updated Oct 12, 2026

TLS validation in IBM DataStage on Cloud Pak for Data 5.4.0.0 allows man-in-the-middle attackers to steal IAM tokens via forged certificates. The client-side SDK session adapter accepts a forged certificate while automatically attaching the IAM bearer Authorization header. Exploitation requires external network interception, not shared-cluster co-tenancy; the stolen token grants tenant API access to read and manipulate projects, flows, assets, and pipeline definitions.

CVSS severity7.4
High
EPSS probability0.14%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

TLS validation in IBM DataStage on Cloud Pak for Data 5.4.0.0 allows man-in-the-middle attackers to steal IAM tokens via forged certificates. The client-side SDK session adapter accepts a forged certificate while automatically attaching the IAM bearer Authorization header. Exploitation requires external network interception, not shared-cluster co-tenancy; the stolen token grants tenant API access to read and manipulate projects, flows, assets, and pipeline definitions.

The record

CVE
CVE-2026-84418
Published
Oct 12, 2026
Updated
Oct 12, 2026
Vendor
IBM
Product
IBM DataStage on Cloud Pak for Data
Classifications
CWE-295, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.4.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM DataStage on Cloud Pak for Dataversion=5.4.0.0

Published CVSS scores

7.4IBMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

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Technologies

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Your stack

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