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VULNERABILITIES

CVE-2026-16371 Details

Description

Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, Thunderbird 140.13, Firefox ESR 140.15, and Thunderbird 140.15.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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=2008369 [email protected]Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-68/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-70/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-71/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-72/ [email protected]Vendor Advisory

see all 7 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-269Improper Privilege ManagementCISA-ADP

Affected Products

ProductVersions
mozilla firefox
< 140.13.0
< 153.0.0

CPE

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

Remediation

  • No remediation found in references.
mozilla thunderbird
< 140.13.0
>= 141.0, < 153.0

CPE

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

Remediation

  • No remediation found in references.

Change History

8 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-16371
NVD Published Date:
Jul 21, 2026
NVD Last Modified:
Sep 1, 2026
Source:
[email protected]
CVE-2026-16371 Details - Not Deferred