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CVE-2026-2792 Details

Description

Memory safety bugs present in Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CNA: redhat-SADPCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://access.redhat.com/errata/RHSA-2026:3338	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3339	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3361	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3491	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3492	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3493	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3494	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3495	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3496	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3497	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3515	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3516	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3517	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3976	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3978	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3979	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3980	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3981	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3982	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3983	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:3984	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:4022	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:4152	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:4260	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:4432	redhat-SADP
https://access.redhat.com/security/cve/CVE-2026-2792	redhat-SADP
https://bugzilla.redhat.com/show_bug.cgi?id=2442318	redhat-SADP
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2792.json	redhat-SADP
https://bugzilla.mozilla.org/buglist.cgi?bug_id=2008912%2C2010050%2C2010275%2C2012331	[email protected]	Broken Link
https://www.mozilla.org/security/advisories/mfsa2026-13/	[email protected]	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/	[email protected]	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-16/	[email protected]	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/	[email protected]	Vendor Advisory

see all 33 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-787	Out-of-bounds Write	[email protected]
CWE-787	Out-of-bounds Write	CISA-ADP

Affected Products

Product	Versions
mozilla firefox	< 140.8.0 < 148.0
CPE cpe:2.3:a:mozilla:firefox:::::esr:::* cpe:2.3:a:mozilla:firefox:::::-:::* Remediation No remediation found in references.
mozilla thunderbird	< 140.8.0 < 148.0
CPE cpe:2.3:a:mozilla:thunderbird:::::esr:::* cpe:2.3:a:mozilla:thunderbird:::::-:::* Remediation No remediation found in references.

Change History

9 change records found show changes

Date	Action	Recorded By
Jul 15, 2026	CVE Modified	redhat-SADP
Jun 30, 2026	CVE Modified	redhat-SADP
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Apr 13, 2026	CVE Modified	[email protected]
Feb 25, 2026	CVE Modified	CISA-ADP
Feb 25, 2026	Initial Analysis	[email protected]
Feb 24, 2026	CVE Modified	[email protected]
Feb 24, 2026	New CVE Received	[email protected]