CVE-2026-15995 Overview
CVE-2026-15995 is a race condition vulnerability affecting IBM Cognos Analytics 12.1.3 GA through build 12.1.3-2606251736. The flaw resides in the Agentic AI assistant's concurrent request-handling logic. When multiple authenticated users submit report-related tasks simultaneously, the assistant may return incorrect report summary results or fail to complete report processing. The issue is categorized under [CWE-362] (Concurrent Execution using Shared Resource with Improper Synchronization).
Critical Impact
Authenticated users can trigger inconsistent report output or report-processing failures, undermining the integrity and availability of analytics data produced by the Agentic AI assistant.
Affected Products
- IBM Cognos Analytics 12.1.3 GA
- Builds up to and including 12.1.3-2606251736
- Agentic AI assistant component within Cognos Analytics
Discovery Timeline
- 2026-07-17 - CVE-2026-15995 published to NVD
- 2026-07-20 - Last updated in NVD database
Technical Details for CVE-2026-15995
Vulnerability Analysis
The vulnerability stems from unsafe concurrent handling of report-related tasks within the Agentic AI assistant of IBM Cognos Analytics. Multiple authenticated users submitting report requests at overlapping times cause the assistant to operate on shared state without adequate synchronization. The result is either corrupted report summaries or aborted report processing.
The attack vector is network-based and requires low-privileged authentication. No user interaction is needed, and exploitation complexity is low. The impact is limited to confidentiality and integrity of report data, with no availability impact on the underlying platform.
The CWE classification [CWE-362] identifies the root behavior: a race condition in code that assumes serialized access to shared resources but does not enforce it. In practice, one user's report-processing context can observe or overwrite data belonging to another user's concurrent request.
Root Cause
The Agentic AI assistant lacks proper synchronization primitives around the data structures used to build report summaries. Concurrent tasks read and write shared state without locking, atomic operations, or transactional isolation. This produces non-deterministic outputs when request timing overlaps.
Attack Vector
An authenticated user with normal access to Cognos Analytics can submit report tasks concurrently with other users. Timing the submissions to coincide with other in-flight report jobs increases the probability of triggering the race. Exploitation does not require crafted payloads or elevated privileges — only concurrent legitimate report requests. Technical details are available in the IBM Support Document.
Detection Methods for CVE-2026-15995
Indicators of Compromise
- Report summaries that do not match the underlying data queried by the Agentic AI assistant
- Unexplained report-processing failures or partial results during periods of high concurrent user activity
- User complaints about inconsistent results returned by the same query executed at different times
Detection Strategies
- Correlate report-processing error logs from Cognos Analytics with concurrent session counts to identify race-triggered failures
- Compare Agentic AI assistant output against direct query results for reference reports to identify summary inconsistencies
- Monitor application logs for exceptions raised by the report-processing subsystem under load
Monitoring Recommendations
- Enable verbose logging on the Agentic AI assistant component and forward logs to a centralized analytics platform
- Track the volume of concurrent report requests per user and per tenant to establish a baseline
- Alert on spikes in report task failures or retries that coincide with peak usage windows
How to Mitigate CVE-2026-15995
Immediate Actions Required
- Identify all Cognos Analytics 12.1.3 deployments and confirm the build number against 12.1.3-2606251736
- Restrict use of the Agentic AI assistant to reduced concurrency until the fix is applied
- Review the IBM Support Document for the vendor-supplied remediation package
Patch Information
IBM has published remediation guidance in its support advisory. Administrators should apply the vendor-provided fix for IBM Cognos Analytics 12.1.3 as documented in the IBM Support Document. No public exploit is currently available, and the EPSS probability is low, but integrity of report output warrants prompt patching.
Workarounds
- Limit concurrent access to the Agentic AI assistant through session or role-based throttling until the patch is deployed
- Advise users to validate critical report summaries against direct data queries during the interim period
- Stagger scheduled report tasks to reduce the likelihood of overlapping requests
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
