Multiple vulnerabilities in Mozilla Thunderbird ESR

Description

Multiple 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. Out of bounds memory read or write vulnerability on a JavaScript Promise object can be exploited to cause denial of service.
2. Out of bounds memory read or write vulnerability can be exploited to cause denial of service.

Original advisories

• MFSA2025-40

Related products

• Mozilla-Thunderbird-ESR

CVE list

• CVE-2025-4918
  critical
• CVE-2025-4919
  critical

Read more

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