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VULNERABILITIES

CVE-2026-4706 Details

Description

Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

Metrics

CVSS 3.x Severity and Vector Strings:

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

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://bugzilla.mozilla.org/show_bug.cgi?id=2015091 [email protected]Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-20/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-21/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-22/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-23/ [email protected]

see all 6 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-754Improper Check for Unusual or Exceptional Conditions[email protected]
CWE-754Improper Check for Unusual or Exceptional ConditionsCISA-ADP

Affected Products

ProductVersions
mozilla firefox
< 115.34.0
< 149.0
>= 128.0, < 140.9.0

CPE

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

Remediation

  • No remediation found in references.

Change History

7 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-4706
NVD Published Date:
Mar 24, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-4706 Details - Not Deferred