CVE-2023-29531: Mozilla Firefox

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

An attacker could have caused an out of bounds memory access using WebGL APIs, leading to memory corruption and a potentially exploitable crash. *This bug only affects Firefox and Thunderbird for macOS. Other operating systems are unaffected.* This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.

Affected products

• Mozilla Firefox: before 112.0 (fixed in 112.0)
• Mozilla Firefox ESR: before 102.10 (fixed in 102.10)
• Mozilla Thunderbird: before 102.10 (fixed in 102.10)

Published 2023-06-19. Last modified 2026-06-17.