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VulnerabilityPublished Updated

CVE-2024-7652: Mozilla Firefox · Type Confusion

Affects Mozilla FirefoxSource CVE Database V5

0

Not known to be exploited · CVSS 7.5 High : upgrade to 14.0.0 soon.

Data as of 26 Oct 2026, 08:30 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.6% chance of exploitation in 30 days – higher than 51% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 14.0.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 Sep 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade tc39/ecma262 to 14.0.0.

Affected software

ProductAffectedFixed in
GitHubtc39/ecma262pkg:github/tc39/ecma262Other threatsAffected
  • <14.0.0
Fixed in
  • 14.0.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

1. 2. If you cannot patch yet, organizations should consider restricting network access to Mozilla applications, such as limiting outbound connections or using web proxies to filter malicious content. 3. Employ application whitelisting and sandboxing to limit the impact of potential crashes or exploits. 4. Monitor network and endpoint logs for unusual crashes or behavior indicative of exploitation attempts. 5. Educate users about the importance of updating their browsers and email clients promptly. 6. For managed environments, deploy automated patch management solutions to ensure rapid rollout of fixes. 7. Consider disabling or restricting the use of Async Generators in JavaScript if feasible via configuration or policy controls, though this may impact functionality. 8.

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.

References

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