CVE-2026-84177
Publiée le 2026-11-01 · Dernière modification le 2026-11-02
Apache Wicket (versions 8.0.0–8.19.0, 9.0.0–9.24.0 et 10.0.0–10.11.0) est un framework Java utilisé pour créer des applications web. Une erreur de logique survient lors de la validation des chemins de fichiers pour les ressources statiques ; le framework vérifie le chemin avant d'ajouter des attributs spécifiques tels que le style ou la langue (locale). Si un développeur a utilisé des underscores dans les noms de ses classes de composants, un attaquant peut utiliser ces attributs pour contourner la protection de sécurité et accéder à des modèles de marquage HTML restreints.
Un attaquant peut lire le contenu de ces modèles HTML internes, exposant potentiellement des commentaires de développeurs, des scripts internes et la structure de l'application. Cela affecte la confidentialité, mais ne permet ni la modification de données ni le plantage du système. L'exploitation nécessite un accès réseau et aucune authentification, bien qu'elle dépende de la connaissance par l'attaquant de noms de classes spécifiques — lesquels sont souvent déjà visibles dans les URL de l'application.
DÉTAIL DU VECTEUR CVSS
RÉFÉRENCES
Description officielle du NVD (en anglais)
Incorrect behavior order in Apache Wicket: a file path is validated before the framework appends the attributes that complete it. org.apache.wicket.request.resource.PackageResource asks the configured package resource guard about a path built from the scope class' package and the file name in the request URL, and then hands that same path to the resource stream locator together with a style, a variation and a locale. Those three attributes are decoded from the name of the first query parameter and never appear in the string the guard was given. org.apache.wicket.core.util.resource.locator.ResourceNameIterator appends them to that path, each preceded by an underscore, in the order variation, style, locale, before the file extension, so the file that is opened is not the file the guard approved. org.apache.wicket.markup.html.PackageResourceGuard decides whether an HTML file is a component's markup template by looking for a class file of the same name beside it, stripping one underscore-delimited suffix at a time as it goes. HTML is on the default allow list, so that check is the only thing separating a static HTML file, which may be served, from a markup template, which may not. Asked about the name of a template, the guard refuses it correctly. Asked about a shorter name for which no class exists, it accepts, and a style supplied in the URL then completes that name into the markup template of a component class, which is written to the response. An application is affected if the simple name of any of its component classes contains an underscore and no shorter part of that name is itself a class, such as Report_v2 or Wizard_Step1; an application with no such class name is not affected. No unusual deployment, packaging or configuration is required, and running in deployment rather than development mode does not prevent it. Java naming conventions discourage underscores in class names and no module Wicket ships has one, so no framework markup is exposed; what an application exposes this way is its own. A component whose class name has no underscore is not reachable, and neither is its localized or styled markup, because the guard finds the class file under the base name and refuses the request. The attributes cannot change the file extension and cannot leave the component's package, so nothing beyond HTML files in that package is reachable. Access is read-only, and what is disclosed is developer-authored template content: component structure, developer comments, markup that is rendered only under some conditions, inline script, and the endpoints a template names. No user data, credential or session material is reachable this way. An attacker has to name a class in the target package and the component itself, and Wicket writes fully qualified class names into the URL of every package resource it renders. This issue affects Apache Wicket: from 8.0.0 through 8.19.0, from 9.0.0 through 9.24.0, from 10.0.0 through 10.11.0. Users of Apache Wicket 7.x or older, which are no longer supported, should upgrade to a supported version. Users are recommended to upgrade to version 8.20.0, 9.25.0 or 10.12.0, which fix the issue.