CVE-2026-8706

MEDIUM 6.5

Sensitive user data could be leaked to other applications through Reader mode

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs and receive the response rendered with the signed-in user's cookies. This vulnerability was fixed in Firefox for iOS 151.0.

Vendor	mozilla
Product	firefox for ios
Ecosystems	Browser JavaScript
Industries	Technology
Published	May 19, 2026
Last Updated	May 19, 2026

Stay Ahead of the Next One

Get instant alerts for mozilla firefox for ios

Be the first to know when new medium vulnerabilities affecting mozilla firefox for ios are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

Affected Versions

Mozilla / Firefox for iOS

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=2036618 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-49/

Credits

Muneaki Nishimura