unexpected SecurityException

    Testsuite name: deployment/plugin
JS2JavaSecurityTest::test8025959_CASignedJar
    Product(s) tested: 7u51 b06 x86
    OS/architecture: win 7 x64

    Reproducible: Always
    Reproducible on machine: spb23087.ru.oracle.com

    Is it a Regression:* Yes
    [If Regression] Regression introduced in release/build:
    Test result on the last GAed release for this train: 7u45 b18 Pass

    Is it a platform specific issue: Not sure
    [If platform specific issue] Is it a new (previously unsupported) OS/browser/mode testing: No
    [If new configuration testing] Issue specific to execution mode or OS/browser version: Win x64 JRE x86 Firefox

    Steps to reproduce:
1. Install jre
2. Set Security Level to Medium and Enable Java Console in JCP
3. Load applet http://stt-13.ru.oracle.com/export/home0/tmp/felix/reproduce/JDK-8028040/html/test8025959_CASignedJar.html
4. Accept warning dialog and run app.
If you see SecurityException bug reproduced.