Multiple vulnerabilities in Mozilla Firefox ESR

Description

Multiple vulnerabilities were found in Mozilla Firefox ESR. 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, integer overflow vulnerability in the Graphics can be exploited to cause denial of service.
2. Memory safety vulnerability can be exploited to execute arbitrary code.

Original advisories

• MFSA2026-26

• MFSA2026-27

Exploitation

Related products

• Mozilla-Firefox-ESR

CVE list

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

Read more

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