edwardkim rhwp up to 0.7.14 Service Worker manifest.json privileges management

Summaryinfo

A vulnerability described as problematic has been identified in edwardkim rhwp up to 0.7.14. This issue affects some unknown processing of the file rhwp-chrome/manifest.json of the component Service Worker. Such manipulation leads to privileges management. This vulnerability is listed as CVE-2026-54565. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in edwardkim rhwp up to 0.7.14 and classified as problematic. Affected by this issue is an unknown code block of the file rhwp-chrome/manifest.json of the component Service Worker. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-54565 since 06/15/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

By approaching the search of inurl:rhwp-chrome/manifest.json it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 0.7.15 eliminates this vulnerability.

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Productinfo

Vendor

• edwardkim

Name

• rhwp

Version

• 0.7.0
• 0.7.1
• 0.7.2
• 0.7.3
• 0.7.4
• 0.7.5
• 0.7.6
• 0.7.7
• 0.7.8
• 0.7.9
• 0.7.10
• 0.7.11
• 0.7.12
• 0.7.13
• 0.7.14

Website

• Product: https://github.com/edwardkim/rhwp/

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