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VULNERABILITIES

CVE-2026-6754 Details

Description

Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Metrics

CVSS 3.x Severity and Vector Strings:

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

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://access.redhat.com/errata/RHSA-2026:10757 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:10766 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:10767 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:12285 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:13537 redhat-SADP

see all 36 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-416Use After FreeCISA-ADP
CWE-825Expired Pointer Dereferenceredhat-SADP

Affected Products

ProductVersions
mozilla firefox
< 115.35.0
< 150.0
>= 140.0, < 140.10.0

CPE

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

Remediation

  • No remediation found in references.
mozilla thunderbird
< 140.10.0

CPE

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

Remediation

  • No remediation found in references.

Change History

8 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-6754
NVD Published Date:
Apr 21, 2026
NVD Last Modified:
Jul 15, 2026
Source:
[email protected]
CVE-2026-6754 Details - Not Deferred