CVE-2025-8037

None

Open

TLP:CLEAR

Nameless cookies shadow secure cookies

NVD CVE.org

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Description

Setting a nameless cookie with an equals sign in the value shadowed other cookies. Even if the nameless cookie was set over HTTP and the shadowed cookie included the `Secure` attribute. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1.

Details

EPSS Score ⓘ: 0.22%

12.4th percentile
Confidence: 90%
Published: Jul 22, 2025
Last Modified: Jul 29, 2026

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