DoS vulnerabilities in Mozilla Thunderbird

Description

Denial of service vulnerabilities were found in Mozilla Thunderbird. Malicious users can exploit these vulnerabilities to cause denial of service.

Below is a complete list of vulnerabilities:

1. Denial of service vulnerability in unknown component can be exploited remotely to cause denial of service.
2. Chat UI manipulation by injection

Original advisories

• MFSA2026-63

Exploitation

Related products

• Mozilla-Thunderbird

CVE list

• CVE-2026-57962
  high
• CVE-2026-57963
  high

Read more

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