vulnerability
FreeBSD: VID-91b9790e-de65-11f0-b893-5404a68ad561 (CVE-2025-66490): traefik -- Bypassing security controls via special characters
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:N/AC:L/Au:N/C:P/I:P/A:N) | Dec 21, 2025 | Jan 27, 2026 | Jan 27, 2026 |
Severity
6
CVSS
(AV:N/AC:L/Au:N/C:P/I:P/A:N)
Published
Dec 21, 2025
Added
Jan 27, 2026
Modified
Jan 27, 2026
Description
The traefik project reports: There is a potential vulnerability in Traefik managing the requests using a PathPrefix, Path or PathRegex matcher. When Traefik is configured to route the requests to a backend using a matcher based on the path; if the request path contains an encoded restricted character from the following set ('/', '', 'Null', ';', '?', '#'), it is possible to target a backend, exposed using another router, by-passing the middlewares chain.
Solution
freebsd-upgrade-package-traefik
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