Description

Memory safety bugs present in Firefox ESR 140.6, Thunderbird ESR 140.6, Firefox 146 and Thunderbird 146. 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 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

INFO

Published Date :

2026-01-13T13:30:59.454Z

Last Modified :

2026-04-13T13:52:10.334Z

Source :

mozilla
AFFECTED PRODUCTS

The following products are affected by CVE-2026-0891 vulnerability.

Vendors Products
Mozilla
  • Firefox
  • Firefox Esr
  • Thunderbird
  • Thunderbird Esr
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-0891.

URL Resource
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1964722%2C2000981%2C2003100%2C2003278 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-0891 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-0891 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-01/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-03/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-03/#CVE-2026-0891 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-04/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-05/ cve-icon cve-icon
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