Name: CVE-2026-16398: Exposure of Sensitive Information to an Unauthorized Actor
Creator: Rapid7
Published: 2026-07-21T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-16398, CWE-346, CWE-200, CVSS 7.5, EPSS 0.00149

Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

CVSS Details

CVSS 3.1 Base Score: 7.5
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Mfsa2026 68	—	Upgrade to Mozilla Firefox version 153.0Upgrade to the latest version of Mozilla Firefox	Jul 21, 2026	Jul 21, 2026
Mozilla Thunderbird	—	Upgrade to Mozilla Thunderbird version 153.0Upgrade to the latest version of Mozilla Thunderbird	Jul 21, 2026	Jul 21, 2026

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CVSS Details

Covered by Rapid7

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