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CVE-2026-8706

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

MEDIUM
6.5
CVSS Score
Published: May 19, 2026 at 02:27 PM UTC
Updated: July 23, 2026 at 09:11 PM UTC
1 product affected across 1 vendorFirefox

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Firefox· Mozilla
95%
v < 151.0
Vendor states this is fixed in 151.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Permissions Required
Source: cverecord
https://bugzilla.mozilla.org/show_bug.cgi?id=2036618
Vendor Advisory
Source: cverecord
https://www.mozilla.org/security/advisories/mfsa2026-49/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMCISA-ADP
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusUNDERGOING ANALYSIS
CWE
CWE-200CWE-306

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