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CVE-2026-54565

PUBLISHED 17.09.2026

CNA: GitHub_M

rhwp browser extension performs SSRF / private-network requests and leaks HWP preview data to untrusted pages

Обновлено: 17.09.2026
rhwp is an HWP viewer and editor implemented in Rust and WebAssembly. Prior to rhwp 0.7.15 and rhwp Chrome and Firefox extension 0.2.4, the browser extensions use an all-URLs host permission to detect HWP and HWPX links on visited pages, but the service workers do not validate message senders, URL schemes, or destination addresses before privileged fetches. The affected paths are rhwp-chrome/manifest.json, rhwp-chrome/content-script.js, rhwp-chrome/sw/message-router.js, rhwp-chrome/sw/thumbnail-extractor.js, rhwp-firefox/manifest.json, rhwp-firefox/content-script.js, rhwp-firefox/sw/message-router.js, and rhwp-firefox/sw/thumbnail-extractor.js. An untrusted page can make the fetch-file and extract-thumbnail handlers request localhost or private-network resources. When a target HWP or HWPX file contains an extractable PrvImage, the extension returns the preview as a data URI in page-readable DOM, allowing page script to read it. The flaw also permits internal-resource existence and port probing and extension presence or version fingerprinting. Exploitation requires a user to visit an untrusted page while the extension is enabled, and preview disclosure is limited to an extractable PrvImage. This issue is fixed in rhwp 0.7.15 and rhwp Chrome and Firefox extension 0.2.4.

CWE

Идентификатор Описание
CWE-1385 The product uses a WebSocket, but it does not properly verify that the source of data or communication is valid.
CWE-200 The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
CWE-359 The product does not properly prevent a person's private, personal information from being accessed by actors who either (1) are not explicitly authorized to access the information or (2) do not have the implicit consent of the person about whom the information is collected.
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

CVSS

Оценка Severity Версия Базовый вектор
4.7 MEDIUM 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Доп. Информация

Product Status

rhwp
Product: rhwp
Vendor: edwardkim
Default status: Не определен
Версии:
Затронутые версии Статус
Наблюдалось в версии < 0.7.15 affected
 

Ссылки

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