CVE-2026-27148
Vulnérabilité élevée dans storybook (storybookjs)
Description
Storybook is a frontend workshop for building user interface components and pages in isolation. Prior to versions 7.6.23, 8.6.17, 9.1.19, and 10.2.10, the WebSocket functionality in Storybook's dev server, used to create and update stories, is vulnerable to WebSocket hijacking. This vulnerability only affects the Storybook dev server; production builds are not impacted. Exploitation requires a developer to visit a malicious website while their local Storybook dev server is running. Because the WebSocket connection does not validate the origin of incoming connections, a malicious site can silently send WebSocket messages to the local instance without any further user interaction. If the Storybook dev server is intentionally exposed publicly (e.g. for design reviews or stakeholder demos) the risk is higher, as no malicious site visit is required. Any unauthenticated attacker can send WebSocket messages to it directly. The vulnerability affects the WebSocket message handlers for creating and saving stories. Both are vulnerable to injection via unsanitized input in the componentFilePath field, which can be exploited to achieve persistent XSS or Remote Code Execution (RCE). Versions 7.6.23, 8.6.17, 9.1.19, and 10.2.10 contain a fix for the issue.
Gravité et risque d'exploitation
CVE-2026-27148 obtient un score CVSS de 8.9/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.62 %, ce qui la place devant 48.7 % des CVE référencées.
Que faire ?
- Vérifiez si storybook (versions < 7.6.23, >= 10.0.0, < 10.2.10, >= 8.1.0, < 8.6.17, >= 9.0.0, < 9.1.19) est présent sur votre parc.
- Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
- À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
- Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.
Références
- https://github.com/storybookjs/storybook/security/advisories/GHSA-mjf5-7g4m-gx5w
- https://github.com/storybookjs/storybook/commit/0affdf928bd6fafbadfb1dfe22ce6104805e10e8
- https://github.com/storybookjs/storybook/commit/54689a8add18ea75d628c540f4bc677592a1e685
- https://github.com/storybookjs/storybook/commit/b8cfa77c73940c140acdcd8a06ab1ea913c44761
- https://github.com/storybookjs/storybook/commit/d34085f39c647f5c23c3a3b2d197c18602fcf876
- https://github.com/storybookjs/storybook/releases/tag/v10.2.10
- https://github.com/storybookjs/storybook/releases/tag/v7.6.23
- https://github.com/storybookjs/storybook/releases/tag/v8.6.17
- https://github.com/storybookjs/storybook/releases/tag/v9.1.19