# CVE-2026-81212: IBM DataStage on Cloud Pak for Data unauthenticated Redis write

Source: https://junglewise.ai/threats/cve-2026-81212-ibm-datastage-on-cloud-pak-for-data-5-4-0-0-allows-an  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-20. Updated: 2026-10-20  
License: CC BY 4.0 with a link back

CVE-2026-81212 · Severity: critical · CVSS 10 · Published 2026-10-20

IBM DataStage is a data integration platform deployed on Cloud Pak for Data. An unauthenticated attacker can write arbitrary data to the shared Redis cache used across all tenants, allowing them to poison cached parameters and break the credential encryption boundary that isolates tenant data.

Technologies: [IBM Datastage On Cloud Pak For Data](https://junglewise.ai/threats/technologies/datastage-on-cloud-pak-for-data). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-81212 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-81212 being exploited in the wild.

**How severe is CVE-2026-81212?** Critical severity, with a CVSS score of 10, published 20 October 2026.

**Which products and versions are affected?** IBM Datastage On Cloud Pak For Data 5.4.0.0.

**Is there a fix for CVE-2026-81212?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-81212 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-81212?** Check whether you run IBM Datastage On Cloud Pak For Data at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An unauthenticated user can perform arbitrary writes to a shared Redis instance backing DataStage on Cloud Pak for Data 5.4.0.0, bypassing authentication and isolation controls. The vulnerability allows injection of malicious data into tenant-specific cached keys, compromising flow parameter integrity and the platform's multi-tenant credential separation. No authentication or user interaction is required; the attack is network-based.

## Affected products

- IBM DataStage on Cloud Pak for Data 5.4.0.0

## Timeline

- 2026-10-20: disclosed

## References

- [https://www.ibm.com/support/pages/node/7289603](https://www.ibm.com/support/pages/node/7289603)

## Related threats

- [IBM DataStage XXE injection in Cloud Pak for Data](https://junglewise.ai/threats/cve-2026-80435-ibm-datastage-on-cloud-pak-for-data-5-4-0-0-could-allow-a-remote)
- [IBM DataStage path traversal arbitrary file write](https://junglewise.ai/threats/cve-2026-16433-ibm-datastage-on-cloud-pak-for-data-5-4-0-0-could-allow-a-remote)
- [IBM DataStage on Cloud Pak for Data XSS in X-Forwarded-Host header](https://junglewise.ai/threats/cve-2026-16325-ibm-datastage-on-cloud-pak-for-data-5-4-0-0-could-allow-a-remote)
- [IBM DataStage on Cloud Pak for Data path traversal](https://junglewise.ai/threats/cve-2026-107331-ibm-datastage-on-cloud-pak-for-data-5-4-0-0-could-allow-a-remote)
- [IBM DataStage on Cloud Pak for Data SSRF](https://junglewise.ai/threats/cve-2026-107330-ibm-datastage-on-cloud-pak-for-data-5-4-0-0-could-allow-a-remote)