SB2026040736 - Multiple vulnerabilities in IBM Maximo AI Service
Published: April 7, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Input validation error (CVE-ID: CVE-2026-2391)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due the arrayLimit option in qs does not enforce limits for comma-separated values when comma: true is enabled. A remote attacker can pass overly large string to the application and consume all available memory resources, leading to a denial of service condition.
2) Use of cache containing sensitive information (CVE-ID: CVE-2026-27205)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to when the session object is accessed, Flask should set the Vary: Cookie header. The logic instructs caches not to cache the response, as it may contain information specific to a logged in user. This is handled in most cases, but some forms of access such as the Python in operator were overlooked. The severity and risk depend on the application being hosted behind a caching proxy that doesn't ignore responses with cookies, not setting a Cache-Control header to mark pages as private or non-cacheable, and accessing the session in a way that only touches keys without reading values or mutating the session. A remote attacker can gain unauthorized access to sensitive information on the system.
Remediation
Install update from vendor's website.