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CVE-2026-84132 Details

Description

Information disclosure in the Networking: HTTP component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://bugzilla.mozilla.org/show_bug.cgi?id=2063020	[email protected]	Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-82/	[email protected]	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-85/	[email protected]	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-86/	[email protected]	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-88/	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-200	Exposure of Sensitive Information to an Unauthorized Actor	CISA-ADP

Affected Products

Product	Versions
mozilla firefox	< 153.2.0 >= 154.0.0, < 155.0.0
CPE cpe:2.3:a:mozilla:firefox:::::::: Remediation No remediation found in references.
mozilla thunderbird	< 153.2.0 >= 154.0, < 155.0
CPE cpe:2.3:a:mozilla:thunderbird:::::::: Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Sep 3, 2026	Initial Analysis	[email protected]
Sep 3, 2026	CVE Modified	CISA-ADP
Sep 1, 2026	CVE Modified	[email protected]
Sep 1, 2026	New CVE Received	[email protected]