CVE-2026-8706

Authenticated content disclosure via unauthenticated Reader server

Published May 19, 2026 · Updated May 19, 2026

Information disclosure in Firefox for iOS before 151.0 allows attackers controlling another local application to read authenticated web content. Reader mode exposes an unauthenticated local HTTP server that accepts arbitrary URLs and renders their responses with the signed-in user's cookies. The attacker must run an application on the same iOS device, and the returned responses can contain sensitive user data.

CVSS severity6.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Firefox for iOS before 151.0 allows attackers controlling another local application to read authenticated web content. Reader mode exposes an unauthenticated local HTTP server that accepts arbitrary URLs and renders their responses with the signed-in user's cookies. The attacker must run an application on the same iOS device, and the returned responses can contain sensitive user data.

The record

CVE
CVE-2026-8706
Published
May 19, 2026
Updated
May 19, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-200, CWE-306
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 19, 2026CVE publishedPublication date reported by the CVE source.
  2. May 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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