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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.

🗓️ 03 Sep 2025 21:39:51Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 2 Views

Race condition may allow cross-origin container to gain top-level permissions; affects Firefox and Thunderbird versions listed.

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03 Sep 2025 21:39Current
9.2High risk
Vulners AI Score9.2
CVSS 3.14.7
EPSS0.00112
SSVC
2