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Vulnerability · Published Oct 1, 2026 · Assigned by GitHub_M

CVE-2026-103922Capacitor Android and iOS: remote content can be loaded at the app origin via the internal HTTP proxy path

Critical 9.3

In plain English

A critical-severity security flaw in android from @capacitor. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.3Critical
Exploit odds (30 days)0.3%top 72.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC

Official description

Capacitor is a cross-platform native runtime for web applications. From 6.0.0 until 6.2.2, 7.6.9, 8.3.5, 8.4.3, and 8.5.1, the Android and iOS WebView navigation guard validates a target URL's host and scheme but not its path, allowing a victim who activates an untrusted link to navigate a frame to /_capacitor_http_interceptor_. The native proxy can fetch an attacker-selected URL and return the response as a document at the application's own origin, allowing script in that response to access same-origin storage, cookies, and registered Capacitor plugin capabilities. Applications remain affected when CapacitorHttp is disabled because affected releases serve the proxy path regardless of that setting. This issue is fixed in versions 6.2.2, 7.6.9, 8.3.5, 8.4.3, and 8.5.1.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Mavencom.capacitorjs:core8.4.3GHSA-rvm3-566m-v7fv
Mavencom.capacitorjs:core6.2.2GHSA-rvm3-566m-v7fv
Mavencom.capacitorjs:coreno fix listedGHSA-rvm3-566m-v7fv
Mavencom.capacitorjs:core7.6.9GHSA-rvm3-566m-v7fv
Mavencom.capacitorjs:core8.5.1GHSA-rvm3-566m-v7fv
npm@capacitor/android8.4.3GHSA-rvm3-566m-v7fv
npm@capacitor/android8.5.1GHSA-rvm3-566m-v7fv
npm@capacitor/android7.6.9GHSA-rvm3-566m-v7fv
npm@capacitor/androidno fix listedGHSA-rvm3-566m-v7fv
npm@capacitor/android6.2.2GHSA-rvm3-566m-v7fv
npm@capacitor/iosno fix listedGHSA-rvm3-566m-v7fv
npm@capacitor/ios6.2.2GHSA-rvm3-566m-v7fv
npm@capacitor/ios7.6.9GHSA-rvm3-566m-v7fv
npm@capacitor/ios8.5.1GHSA-rvm3-566m-v7fv
npm@capacitor/ios8.4.3GHSA-rvm3-566m-v7fv

Affected products (as reported)

VendorProductVersions
ionic-team capacitor >= 6.0.0, < 6.2.2>= 7.0.0, < 7.6.9>= 8.0.0, < 8.3.5>= 8.3.5, < 8.4.3>= 8.5.0, < 8.5.1
@capacitor android >= 8.5.0, < 8.5.1>= 8.3.5, < 8.4.3>= 8.0.0, < 8.3.5>= 7.0.0, < 7.6.9>= 6.0.0, < 6.2.2
@capacitor ios >= 8.5.0, < 8.5.1>= 8.3.5, < 8.4.3>= 8.0.0, < 8.3.5>= 7.0.0, < 7.6.9>= 6.0.0, < 6.2.2
com.capacitorjs core >= 8.5.0, < 8.5.1>= 8.3.5, < 8.4.3>= 8.0.0, < 8.3.5>= 7.0.0, < 7.6.9>= 6.0.0, < 6.2.2
swift github.com/ionic-team/capacitor-swift-pm >= 8.5.0, < 8.5.1>= 8.3.5, < 8.4.3>= 8.0.0, < 8.3.5>= 7.0.0, < 7.6.9>= 6.0.0, < 6.2.2

Weakness: CWE-346, CWE-441 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

References