CVE-2026-90452Improper certificate validation in Malcolm
Updated under an hour ago ()
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It affects CISA Malcolm. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- Weakness (CWE)
- CWE-295
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- icscert
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 2, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
CISA Malcolm cisa:malcolm (from the name) | before v26.06.0; v26.06.0 not affected | CNA record |
References
- https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-254-01.jsongovernment-resource, vendor-advisory
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-254-01
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.