CVE-2026-8706

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

State: Published
Severity: 6.5 Medium
Published: May 19, 2026
Updated: May 19, 2026
Reserved: May 15, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	CISA-ADP

Weaknesses

CWE-306 Missing Authentication for Critical Function
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Affected Products

Product	Versions
Firefox for iOSMozilla	151.0 and laterNot affected

References

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