CVE-2026-8706

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

CVSS 6.5 MEDIUMEPSS 0.2%CWE-200 CWE-306

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.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Mozilla · Firefox for iOS

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References

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