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VULNERABILITIES

CVE-2026-8953 Details

Description

Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:9.6 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://bugzilla.mozilla.org/show_bug.cgi?id=2029511 [email protected]Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-46/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-47/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-50/ [email protected]Vendor Advisory

see all 6 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-416Use After FreeCISA-ADP

Affected Products

ProductVersions
mozilla firefox
< 115.36.0
< 151.0.0
>= 140.0, < 140.11.0

CPE

  • cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*

Remediation

  • No remediation found in references.
mozilla thunderbird
< 140.11

CPE

  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

6 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-8953
NVD Published Date:
May 19, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]