Multiple vulnerabilities in Mozilla Thunderbird

Description

Multiple vulnerabilities were found in Mozilla Thunderbird. Malicious users can exploit these vulnerabilities to cause denial of service, execute arbitrary code.

Below is a complete list of vulnerabilities:

1. Incorrect boundary conditions vulnerability in the Graphics can be exploited to cause denial of service.
2. Memory safety vulnerability can be exploited to execute arbitrary code.
3. Incorrect boundary conditions vulnerability, integer overflow vulnerability in the Graphics can be exploited to cause denial of service.

Original advisories

• MFSA2026-28

Exploitation

Public exploits exist for this vulnerability.

Related products

• Mozilla-Thunderbird

CVE list

• CVE-2026-5731
  critical
• CVE-2026-5732
  critical
• CVE-2026-5733
  critical
• CVE-2026-5734
  critical
• CVE-2026-5735
  critical

Read more

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