CVE-2026-92068
MEDIUMCVSS 5.4/10EPSS 0.11%
Last modified
CVE-2026-92068 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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.. EPSS estimates a 0.11% chance of exploitation in the next 30 days.
Description
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 153.3.0 |
| Mozilla | Firefox | >= 154.0.0, < 156.0.0 |
| Mozilla | Thunderbird | < 153.3.0 |
| Mozilla | Thunderbird | >= 154.0, < 156.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2058790Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-90/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-93/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-94/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-96/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-92068?
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.
How severe is CVE-2026-92068?
CVE-2026-92068 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.11% probability of exploitation in the next 30 days.
How do I fix CVE-2026-92068?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
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Are you affected by CVE-2026-92068?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST