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Editorial Team
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Asked: 2026-05-28T00:06:58+00:00

Does anyone know what changed in the configuration between Tomcat 6 and Tomcat 7

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Does anyone know what changed in the configuration between Tomcat 6 and Tomcat 7 that would cause the JSESSIONID cookie to not be accessible via JavaScript?

Using Tomcat 6:

alert(document.cookie); // JSESSIONID=8675309ABCDEF...

Using Tomcat 7:

alert(document.cookie); // nothing
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1 Answer

  1. Editorial Team

    Okay, I found the answer. The useHttpOnly attribute was set to false by default in Tomcat 6, and is true in Tomcat 7. This attribute is set for the <Context> container.

    <Context useHttpOnly="false" [...] />

    For more information about updating from Tomcat 6 to 7: Migrating from 6.0.x to 7.0.x

    I’m not sure why I didn’t see that in the docs before, but I’ve verified that setting this to false does in fact cause Tomcat 7 to revert to the Tomcat 6 behavior.

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