Does Google App Engine support SSL 3?

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Joshua Fox

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Jan 9, 2018, 6:22:17 AM1/9/18
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Do GAE Standard and Flexible Environments support  or disable SSL 3, which is vulnerable to the Poodle attack?

Kenworth (Google Cloud Platform)

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Jan 9, 2018, 1:49:59 PM1/9/18
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AFAIK, SSLv3 support has been disabled for GAE Standard and Flex. Google discovered this vulnerability and solutions had since been implemented. In fact, modern browsers now disables the support for SSLv3 (starting Chrome v40, SSLv3 support is disabled by default).

You can also test this manually if your server supports SSLv3. Example on any Unix machine: 

openssl s_client -connect <host>:<port> -ssl3

A host that has SSLv3 disabled will return an error with handshake failure in it.


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