Malcolm's front nginx reverse proxy defines a "Dashboards → Arkime shortcut" location using a case-insensitive regex matcher but a case-sensitive rewrite. A request whose path segment is not exact-lowercase (for example /IDDASH2ARK/...) enters the location (the matcher fires) but evades the rewrite (no redirect is issued), so nginx falls through to the location's proxy_pass to the Arkime backend. That location is the one proxied location in the shipped config that does not include the per-location authentication file, so the request reaches Arkime unauthenticated. The same location also forwards a client-supplied X-Forwarded-User header un-overwritten, and Arkime is configured to trust X-Forwarded-User as the authenticated username — so an unauthenticated network caller can reach the Arkime backend while supplying a forged, auto-provisioned identity.
Metrics
Affected Vendors & Products
References
History
Fri, 09 Oct 2026 09:30:00 +0000
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ssvc
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Fri, 09 Oct 2026 07:30:00 +0000
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Cisagov
Cisagov malcolm |
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Cisagov
Cisagov malcolm |
Thu, 08 Oct 2026 17:30:00 +0000
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| Description | Malcolm's front nginx reverse proxy defines a "Dashboards → Arkime shortcut" location using a case-insensitive regex matcher but a case-sensitive rewrite. A request whose path segment is not exact-lowercase (for example /IDDASH2ARK/...) enters the location (the matcher fires) but evades the rewrite (no redirect is issued), so nginx falls through to the location's proxy_pass to the Arkime backend. That location is the one proxied location in the shipped config that does not include the per-location authentication file, so the request reaches Arkime unauthenticated. The same location also forwards a client-supplied X-Forwarded-User header un-overwritten, and Arkime is configured to trust X-Forwarded-User as the authenticated username — so an unauthenticated network caller can reach the Arkime backend while supplying a forged, auto-provisioned identity. | |
| Title | Authentication Bypass by Spoofing in Malcolm | |
| Weaknesses | CWE-290 CWE-441 CWE-863 |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: icscert
Published: 2026-10-08T17:20:46.517Z
Updated: 2026-10-14T19:39:35.096Z
Reserved: 2026-10-07T18:31:15.966Z
Link: CVE-2026-107336
Updated: 2026-10-08T19:07:19.471Z
Status : Awaiting Analysis
Published: 2026-10-08T18:17:20.177
Modified: 2026-10-08T21:03:43.847
Link: CVE-2026-107336
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