Description

Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. 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 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

INFO

Published Date :

2026-03-24T12:30:43.271Z

Last Modified :

2026-04-13T13:51:17.655Z

Source :

mozilla
AFFECTED PRODUCTS

The following products are affected by CVE-2026-4720 vulnerability.

Vendors Products
Mozilla
  • Firefox
  • Firefox Esr
  • Thunderbird
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-4720.

URL Resource
https://bugzilla.mozilla.org/buglist.cgi?bug_id=2004652%2C2019372%2C2021922%2C2022567%2C2022733 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-4720 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-4720 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-20/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-22/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4720 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-23/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-24/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4720 cve-icon
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