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VULNERABILITIES

CVE-2026-8947 Details

Description

Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

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-2026:21378 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:21380 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:21381 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:21382 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:22325 redhat-SADP

see all 30 references

Weakness Enumeration

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

Affected Products

ProductVersions
mozilla firefox
< 115.36.0
< 151.0.0
>= 140.0, < 140.11.0

CPE

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

Remediation

  • No remediation found in references.
mozilla thunderbird
< 140.11

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-2026-8947
NVD Published Date:
May 19, 2026
NVD Last Modified:
Jul 15, 2026
Source:
[email protected]
CVE-2026-8947 Details - Not Deferred