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Security releases

Mozilla

Mozilla Security Releases - September 2026

mozilla-2026-09 Sep 1, 2026 Source: Vendor

Mozilla security advisories for September 2026, compiled from CVE.org records.

Source of record The credited names below are quoted verbatim from the vendor's own advisory: https://www.cve.org/CVERecord?id=CVE-2026-103500
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Credited

1 line
All 1 CVEs 1 Additional recognition 0 Unclaimed only
Showing 1–1 of 1
CVE-2026-103500 BR2026-0000-036980 Thunderbird unclaimed
An attacker could cause a heap buffer overflow by getting a user to open an email that is greater than or equal to 2GB in size. This vulnerability was fixed in Thunderbird 157, Thunderbird 140.17, ...
Credited as Ahmed Albalawi