CVE-2026-90452
Improper certificate validation in Malcolm
CVSS Score
5.3
EPSS Score
0.1%
EPSS Percentile
2th
Requests from the reverse proxy to the identity-provider service for token discovery, introspection, and credential exchange do not verify the identity provider's server certificate. An attacker positioned on the network path between the proxy and the identity provider could impersonate the identity provider and issue forged authentication tokens accepted by the deployment.
| CWE | CWE-295 |
| Vendor | cisa |
| Product | malcolm |
| Published | Sep 11, 2026 |
| Last Updated | Oct 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
CISA / Malcolm
0 < v26.06.0