What’s Vulnerable › Vulnerabilities

CVE-2024-6601: Race condition in permission assignment

• Severity: medium (CVSS 4.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-07-09 · updated 2026-06-17
• Weakness: CWE-367

Description

A race condition could lead to a cross-origin container obtaining permissions of the top-level origin. This vulnerability affects Firefox < 128, Firefox ESR < 115.13, Thunderbird < 115.13, and Thunderbird < 128.

Affected products

• Mozilla Firefox: before 128.0 — fixed in 128.0
• Mozilla Thunderbird: before 128.0 — fixed in 128.0

How to fix

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

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1890748
• 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/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1890748
• 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/

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