Access Control Flaw in Vendor Product Exposes User Roles
CVE-2026-90450

5.3MEDIUM

Key Information:

Vendor

Cisa

Status
Vendor
CVE Published:
11 September 2026

What is CVE-2026-90450?

This vulnerability allows any authenticated user to access request handlers that are not explicitly defined in the role requirement table of the application. As a result, newly created request handlers default to being accessible by all authenticated users, effectively bypassing intended access controls. This poses significant security risks, as unauthorized users may exploit these fail-open configurations to gain improper access.

Affected Version(s)

Malcolm 0

Malcolm v26.06.0

References

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.