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Vulnerability record · CVE-2026-16352 · published 21 July 2026

CVE-2026-16352: Mozilla firefox use after free vulnerability

Mozilla · Firefox

Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

9.8 CVSS 3.1 Critical EPSS 0.39% · top 69.0% CWE-416 · Use after free
9.8CVSS 3.1 base score
0.39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
24 Jul 2026Last modified by NVD

Description

Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.mozilla.org/show_bug.cgi?id=2046416 Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-68/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-69/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-70/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-71/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-72/ Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-16352), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.