CVE-2026-92068

What it is

Site isolation issue in the Reader Mode component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

At a glance

Exploitability

Can be exploited over the network without logging in, but needs a user to act. Limited direct impact.

Exploit odds

0.1% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-09-15 13:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-05 19:41 UTC Last updatedMost recent change to the record

Details

Published

2026-09-15 13:17 UTC

Last modified

2026-10-05 19:41 UTC

Exploit probability

0.1% · EPSS, next 30 days

Weakness

CWE-346

Record status

Analyzed

Affected

• Mozilla Firefox < 153.3.0
• Mozilla Firefox < 156.0.0
• Mozilla Thunderbird < 153.3.0
• Mozilla Thunderbird < 156.0

Attack profile CVSS 3.1 · 5.4

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None