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VULNERABILITIES

CVE-2026-100820 Details

Description

Privilege escalation in the Address Bar component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.

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=2071645 [email protected]
https://www.mozilla.org/security/advisories/mfsa2026-100/ [email protected]
https://www.mozilla.org/security/advisories/mfsa2026-101/ [email protected]
https://www.mozilla.org/security/advisories/mfsa2026-102/ [email protected]
https://www.mozilla.org/security/advisories/mfsa2026-103/ [email protected]

see all 7 references

Weakness Enumeration

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

Affected Products

No affected product data is available for this CVE.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-100820
NVD Published Date:
Sep 29, 2026
NVD Last Modified:
Sep 30, 2026
Source:
[email protected]
CVE-2026-100820 Details - Not Deferred