What is CVE-2026-8706?

CVE-2026-8706 is a medium-severity vulnerability in Mozilla Firefox, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-05-19.

How severe is CVE-2026-8706?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Mozilla Firefox

CVE-2026-8706

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 wa…

Vulnerability class: Information Disclosure

EPSS: 0.000 (5.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Mozilla Firefox
Mozilla Firefox For Ios — versions 151.0

Weakness classification (CWE)

References

security@mozilla.org (Permissions Required)
security@mozilla.org (Vendor Advisory)

Frequently asked questions

What is CVE-2026-8706?: CVE-2026-8706 is a medium-severity vulnerability in Mozilla Firefox, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-05-19.
How severe is CVE-2026-8706?: Medium severity. CVSS v3 base score is 6.5 out of 10.