CVE-2026-8706

MEDIUM

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

Title source: cna

Description

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.

References (2)

Core 2

Core References

https://bugzilla.mozilla.org/show_bug.cgi?id=2036618

https://www.mozilla.org/security/advisories/mfsa2026-49/

Scores

CVSS v3 6.5

EPSS 0.0001

EPSS Percentile 3.3%

Attack Vector ADJACENT_NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-200 CWE-306

Status published

Products (2)

mozilla/firefox < 151.0

Mozilla/Firefox for iOS 151.0

Published May 19, 2026

Tracked Since May 19, 2026