Security Bulletin
Summary
IBM Bob could allow a remote attacker to execute arbitrary code when a user opens an untrusted repository in Bob Shell. Due to insufficient validation of workspace-provided MCP server configurations, MCP servers defined within the repository could be automatically executed without explicit user consent. This vulnerability has been addressed by introducing a Workspace Folder Trust feature that prevents initialization of workspace-defined MCP servers and other workspace configurations unless the repository is explicitly trusted by the user.
Vulnerability Details
CVEID: CVE-2026-9764
DESCRIPTION: IBM Bob could allow a remote attacker to inject arbitrary code on the system, due to the improper control of user input code.
CWE: CWE-94: Improper Control of Generation of Code ('Code Injection')
CVSS Source: IBM
CVSS Base score: 8.8
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| IBM Bob Shell | 1.0.4 to 2.0.1 |
Remediation/Fixes
IBM strongly recommends addressing the vulnerability now by upgrading to IBM Bob Shell V 2.0.2 or the later.
We recommend reviewing the documentation for guidance on installing IBM Bob.
Workarounds and Mitigations
Until an upgrade can be applied, IBM recommends the following precautions:
Get Notified about Future Security Bulletins
References
Acknowledgement
Change History
07 Oct 2026: Initial Publication
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.
Document Location
Worldwide
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Document Information
Modified date:
07 October 2026
Initial Publish date:
07 October 2026
UID
ibm17291535