Vulnerability in @Capacitor Android
CVE-2026-103922
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- @Capacitor Android — versions >= 6.0.0, < 6.2.2, >= 7.0.0, < 7.6.9, >= 8.0.0, < 8.3.5
- @Capacitor iOS — versions >= 6.0.0, < 6.2.2, >= 7.0.0, < 7.6.9, >= 8.0.0, < 8.3.5
- Com.capacitorjs Core — versions >= 6.0.0, < 6.2.2, >= 7.0.0, < 7.6.9, >= 8.0.0, < 8.3.5
- Ionic-Team Capacitor — versions >= 6.0.0, < 6.2.2, >= 7.0.0, < 7.6.9, >= 8.0.0, < 8.3.5
- Swift Github.com/ionic-Team/capacitor-Swift-Pm — versions >= 6.0.0, < 6.2.2, >= 7.0.0, < 7.6.9, >= 8.0.0, < 8.3.5
Weakness classification (CWE)
References
- github.com/ionic-team/capacitor/security/advisories/GHSA-rvm3-566m-v7fv
- github.com/ionic-team/capacitor/commit/430356a91e1419fc66862dc09835081aa501677e
- github.com/ionic-team/capacitor/commit/80b6c5e81d062e1e158914040f49e044d95b7ccb
- github.com/ionic-team/capacitor/commit/85ccc44151fdd5ae5e0d806d875766ef4b84ad5d
- github.com/ionic-team/capacitor/commit/af9a287fef45f0ac68ce640cb42fed2d06b0f1b4
- github.com/ionic-team/capacitor/commit/d5e3170ba0ff155fc542b7e6d16cff5201406540
- github.com/ionic-team/capacitor/commit/ee586ae680887ba99d066616f976db149542d922
- github.com/ionic-team/capacitor/releases/tag/8.5.1
Frequently asked questions
- What is CVE-2026-103922?
- CVE-2026-103922 is a critical-severity vulnerability in @Capacitor Android, classified under Origin Validation Error. CVSS score: 9.3/10. Published 2026-10-01.
- How severe is CVE-2026-103922?
- Critical severity. CVSS v3 base score is 9.3 out of 10.