CVE-2026-107336: Authentication Bypass by Spoofing

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 n...

CVE-2026-107333: Incorrect Authorization

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...

CVE-2026-107337: Cross-Site Request Forgery (CSRF)

The Malcolm kiosk Flask application exposes a POST /scriptcall/...

PT-2026-108106

Name of the Vulnerable Software and Affected Versions Malcolm kiosk affected versions not specified Description The Flask application exposes the 'POST /script call/' endpoint without authentication and utilizes wildcard Cross-Origin Resource Sharing CORS, which allows requests from any origin...

PT-2026-108108

Name of the Vulnerable Software and Affected Versions Malcolm affected versions not specified Description The file-upload component incorporates the FilePond PHP server, which includes an index.php file exposing a fetch API route. This route allows the server to download an arbitrary URL using cu...

PT-2026-108104

Name of the Vulnerable Software and Affected Versions Malcolm affected versions not specified Description The upload-processing pipeline in scripts/safe-extract.py fails to apply entry-count, nesting-depth, and total-uncompressed-byte limits when processing single-stream compressed formats such a...

Malcolm v26.08.0

Malcolm Malcolm is a powerful network traffic analysis tool suite designed with the following goals in mind: Easy to use – Malcolm accepts network traffic data in the form of full packet capture PCAP files, Zeek logs, and Suricata alerts. These artifacts can be uploaded via a simple browser-based...

Malcolm v26.08.0

Malcolm Malcolm is a powerful network traffic analysis tool suite designed with the following goals in mind: Easy to use – Malcolm accepts network traffic data in the form of full packet capture PCAP files, Zeek logs, and Suricata alerts. These artifacts can be uploaded via a simple browser-based...

CVE-2026-19670

Malcolm's nginx Lua role-based access control RBAC layer decides whether an authenticated user may reach a role-restricted path e.g. /htadmin, /auth, /adminlogin, /arkime/api/esadmin, NetBox, upload endpoints by pattern-matching the raw, percent-encoded request URI. Nginx itself, however, selects...

CVE-2026-19671

Malcolm's upload-processing pipeline scripts/safe-extract.py enforces entry-count, nesting-depth, and total-uncompressed-byte limits when extracting container archives zip/tar/rar/7z via libarchive, but those limits are not applied when the uploaded file is a single-stream compressed format .gz,...

CVE-2026-19671 Improper handling of highly compressed data (data amplification) in CISA Malcolm

Malcolm's upload-processing pipeline scripts/safe-extract.py enforces entry-count, nesting-depth, and total-uncompressed-byte limits when extracting container archives zip/tar/rar/7z via libarchive, but those limits are not applied when the uploaded file is a single-stream compressed format .gz,...

CVE-2026-19671 Improper handling of highly compressed data (data amplification) in CISA Malcolm

Malcolm's upload-processing pipeline scripts/safe-extract.py enforces entry-count, nesting-depth, and total-uncompressed-byte limits when extracting container archives zip/tar/rar/7z via libarchive, but those limits are not applied when the uploaded file is a single-stream compressed format .gz,...

CVE-2026-19671

Malcolm's safe-extract.py enforces decompression limits only on container archives (zip/tar/rar/7z) but not on single-stream formats (.gz/.xz/.lzma/.lz). An authenticated user can upload a small gzip bomb that decompresses unboundedly, exhausting the shared Docker volume used by OpenSearch, Logst...

CVE-2026-19671 Improper handling of highly compressed data (data amplification) in CISA Malcolm

Malcolm's upload-processing pipeline scripts/safe-extract.py enforces entry-count, nesting-depth, and total-uncompressed-byte limits when extracting container archives zip/tar/rar/7z via libarchive, but those limits are not applied when the uploaded file is a single-stream compressed format .gz,...

CVE-2026-19670 Incorrect Authorization in CISA Malcolm

Malcolm's nginx Lua role-based access control RBAC layer decides whether an authenticated user may reach a role-restricted path e.g. /htadmin, /auth, /adminlogin, /arkime/api/esadmin, NetBox, upload endpoints by pattern-matching the raw, percent-encoded request URI. Nginx itself, however, selects...

CVE-2026-19670 Incorrect Authorization in CISA Malcolm

Malcolm's nginx Lua role-based access control RBAC layer decides whether an authenticated user may reach a role-restricted path e.g. /htadmin, /auth, /adminlogin, /arkime/api/esadmin, NetBox, upload endpoints by pattern-matching the raw, percent-encoded request URI. Nginx itself, however, selects...

CVE-2026-19670 Incorrect Authorization in CISA Malcolm

Malcolm's nginx Lua role-based access control RBAC layer decides whether an authenticated user may reach a role-restricted path e.g. /htadmin, /auth, /adminlogin, /arkime/api/esadmin, NetBox, upload endpoints by pattern-matching the raw, percent-encoded request URI. Nginx itself, however, selects...

CVE-2026-19670

Malcolm's nginx Lua RBAC layer pattern-matches the raw percent-encoded URI while nginx routes using the decoded URI, allowing an authenticated low-privilege user to access admin-only paths via encoded URLs like /%68tadmin.php. CVSS 5.4 (MEDIUM); no in-the-wild exploitation reported. No patch vers...

CISA Malcolm

ADVISORY SUMMARY Successful exploitation of these vulnerabilities could allow an attacker to cause a denial-of-service condition or execute arbitrary code. 2. RECOMMENDED PRACTICES CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities...

CVE-2026-19671: Improper Handling of Highly Compressed Data (Data Amplification)

Malcolm's upload-processing pipeline scripts/safe-extract.py enforces entry-count, nesting-depth, and total-uncompressed-byte limits when extracting container archives zip/tar/rar/7z via libarchive, but those limits are not applied when the uploaded file is a single-stream compressed format .gz,...