CVE-2026-107333Incorrect Authorization 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.
EPSS puts the chance of exploitation in the next 30 days at 0.98%, higher than 61% of scored CVEs.
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Malcolm's nginx based reverse proxy contains a URL path normalization inconsistency between its Lua based role-based access control (RBAC) authorization layer and nginx's own request routing logic. An authenticated user can craft a specially formatted request path to bypass role-based restrictions and reach administrative or role gated endpoints they should not have access to. This affects all restricted paths protected by the RBAC authorization layer, including file upload, PHP server, htadmin, and authentication management interfaces.
- CVSS
- 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.98% (percentile 61)
- Assigned by
- icscert
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
CISA Malcolm cisa:malcolm (from the name) | through 26.07.1; 26.08.0 not affected | CNA record |
References
- https://github.com/cisagov/Malcolm/security/advisories/GHSA-v66f-cwcm-hf73
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-280-01.jsongovernment-resource
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.