auditing-mobile-webview-bridge-exposure SKILL.md skillA
auditing-mobile-webview-bridge-exposure from unboundcompute/security-agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add unboundcompute/security-agent-skills/auditing-mobile-webview-bridge-exposure@git:20260908.e3ae18aPins git:20260908.e3ae18a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- unboundcompute/security-agent-skills
- Path
skills/auditing-mobile-webview-bridge-exposure/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260908.e3ae18a, committed Sep 8, 2026
- Size
- 10,118 bytes
- Repository stars
- 26
- License
- MIT
Audit the trust a mobile app places in web content loaded in an embedded WebView, where a native bridge exposes app capabilities to JavaScript, letting web content that the app did not author, remote pages, loaded third-party frames, or attacker-influenced URLs, call native methods, read app data, or act with the app's privileges, because the bridge is exposed to untrusted origins, the loaded content is not origin-restricted, or the bridge methods do not check the caller. Use when a native app…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Auditing mobile WebView bridge exposure: when a web page calls into the native app A mobile app that embeds a WebView often gives the web content a way to call back into native code: a bridge that exposes native methods to JavaScript so the page can use the camera, read files, fetch tokens, or drive app features. That bridge is safe only when the content on the other side is trusted and confined, content the app authored, loaded from an origin it controls, over a channel that cannot be tampered with. It becomes an exposure when untrusted content reaches the bridge: a remote page the app loads, a third-party frame inside it, a link the WebView follows to an attacker origin, or content injected over an insecure channel. Then web script the app did not author invokes native methods and acts with the app's privileges. The bug is a native capability reachable from web content the app does not fully trust, whether because the bridge is exposed to untrusted origins, the WebView loads content it should not, or the bridge methods trust any caller. You audit these by tracing which content can reach the bridge and what each exposed method does. ## When to use …
Read the whole file at its exact version.
How to install
mdr add unboundcompute/security-agent-skills/auditing-mobile-webview-bridge-exposure@sha256:bca891a7caf129eaThe line at the top of this page pins the label git:20260908.e3ae18a, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_bwmekqg3pohs5edt)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 8, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (10118 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
unboundcompute/security-agent-skills · 26 stars · license MIT · pushed 2026-09-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_bwmekqg3pohs5edt GET https://markdownregistry.com/api/v1/resolve?ref=unboundcompute/security-agent-skills/auditing-mobile-webview-bridge-exposure GET https://markdownregistry.com/api/v1/blob/bca891a7caf129ea07c7a18ee20056aef0d71f568b7fec029db10a610c5035fb
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.