HIGH 7.1 NVD
CVE-2026-63177
Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, role-based access control enforced in the Nginx OpenResty Lua layer evaluates the ra
Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, role-based access control enforced in the Nginx OpenResty Lua layer evaluates the raw, unnormalized `ngx.var.request_uri`, while Nginx itself routes requests using the normalized path. An authenticated low-privilege user can prepend a traversal segment (for example `/x/../upload/...`) so that Nginx routes the request to a restricted backend while the Lua role check fails to match any rule and falls open, granting access it should deny. Version 26.07.0 fixes the issue.
References
- https://github.com/cisagov/Malcolm/releases/tag/v26.07.0
- https://github.com/cisagov/Malcolm/security/advisories/GHSA-m5fr-rv3h-xg2r
This high severity vulnerability with a CVSS score of 7.1 was published on 2026-08-11 via NVD.
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