# CVE-2026-76587: IBM Planning Analytics stack-based buffer overflow in TM1 OData engine

Source: https://junglewise.ai/threats/cve-2026-76587-ibm-planning-analytics-2-0-and-2-1-are-vulnerable-to-a-stack  
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-2026-76587 · Severity: high · CVSS 8.8 · Published 2026-10-20

IBM Planning Analytics is a business intelligence and planning platform used to analyze financial and operational data. Versions 2.0 and 2.1 contain a stack-based buffer overflow vulnerability in the TM1 C++ OData engine that allows authenticated users to execute arbitrary code on the server, potentially compromising the entire system and any data stored within it.

Technologies: [IBM Planning Analytics](https://junglewise.ai/threats/technologies/planning-analytics). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-76587 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76587 being exploited in the wild.

**How severe is CVE-2026-76587?** High severity, with a CVSS score of 8.8, published 20 October 2026.

**Which products and versions are affected?** IBM Planning Analytics 2.0, 2.1.

**Is there a fix for CVE-2026-76587?** 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-2026-76587 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-76587?** Check whether you run IBM Planning Analytics 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

The vulnerability is a CWE-121 stack-based buffer overflow in the TM1 C++ OData engine component, reachable via authenticated REST API calls. An authenticated attacker can craft a malicious request to overflow the stack buffer and execute arbitrary code with the privileges of the application. The vulnerability requires valid authentication credentials but no user interaction.

## Affected products

- IBM Planning Analytics 2.0, 2.1

## Timeline

- 2026-10-20: disclosed

## References

- [https://www.ibm.com/support/pages/node/7291604](https://www.ibm.com/support/pages/node/7291604)

## Related threats

- [IBM Planning Analytics stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-85457-ibm-planning-analytics-2-0-and-2-1-could-allow-a-remote)
- [IBM Planning Analytics cross-site scripting in JavaScript output encoding](https://junglewise.ai/threats/cve-2026-75063-ibm-planning-analytics-2-0-and-2-1-could-allow-a-remote)
- [IBM Planning Analytics path traversal in workspace component](https://junglewise.ai/threats/cve-2026-75061-ibm-planning-analytics-2-0-and-2-1-could-allow-a-remote-attacker)
- [IBM Planning Analytics path validation bypass](https://junglewise.ai/threats/cve-2026-19627-ibm-planning-analytics-2-0-and-2-1-could-allow-a-remote-attacker)
- [IBM Planning Analytics authentication bypass in sub-request validation](https://junglewise.ai/threats/cve-2026-19622-ibm-planning-analytics-2-0-and-2-1-could-allow-a-remote-attacker)