CVE-2025-8037 — Nameless cookies shadow secure cookies
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` at…
Published: 2025-07-22 · CVSS: 9.1 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7