What’s Vulnerable › Vulnerabilities

CVE-2024-7652: Type Confusion in Async Generators in Javascript Engine

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-09-06 · updated 2026-06-17
• Weakness: CWE-476

Description

An error in the ECMA-262 specification relating to Async Generators could have resulted in a type confusion, potentially leading to memory corruption and an exploitable crash. This vulnerability affects Firefox < 128, Firefox ESR < 115.13, Thunderbird < 115.13, and Thunderbird < 128.

Affected products

• Mozilla Firefox: before 115.13.0; before 128.0 — fixed in 115.13.0, 128.0
• Mozilla Thunderbird: before 115.13.0; from 116.0 before 128.0 — fixed in 115.13.0, 128.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 115.13.0, 128.0; Mozilla Thunderbird 115.13.0, 128.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1901411
• https://github.com/tc39/ecma262/security/advisories/GHSA-g38c-wh3c-5h9r
• https://www.mozilla.org/security/advisories/mfsa2024-29/
• https://www.mozilla.org/security/advisories/mfsa2024-30/
• https://www.mozilla.org/security/advisories/mfsa2024-31/
• https://www.mozilla.org/security/advisories/mfsa2024-32/

Get alerted when CVE-2024-7652 or the next vulnerability affects your stack