Authenticated RCE in IBM DataStage on Cloud Pak for Data — an enterprise data integration platform; exploit could lead to widespread data/system compromise and service disruption.
CVE-2026-84421
Auth RCE via archive path validation bug in IBM DataStage on Cloud Pak for Data.
Is CVE-2026-84421 being exploited?
Not confirmed. CVE-2026-84421 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.
How severe is CVE-2026-84421?
CVE-2026-84421 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-84421?
Yes. A fix has been recorded for CVE-2026-84421. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-84421 affect?
CVE-2026-84421 affects IBM DataStage on Cloud Pak for Data 5.4.0.0. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-84421?
Apply vendor patch immediately; restrict access and review logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated remote attacker can execute arbitrary code via improper path validation during archive extraction, leading to full system compromise.
Immediate action required
- affected5.4.0.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.