Problem

When accessing JIRA in Chrome, the following  security warning is being shown for the site:

Diagnosis

Environment

• Using Chrome browser.
• Other browsers does not show the security warning.
• JIRA is using SSL.

Cause

The certificate used in JIRA is signed with SHA-1.

Workaround

You can click to proceed anyway when accessing JIRA, or add the application URL in the security exceptions of the browser.

Resolution

SHA-1 was deprecated in Chrome version 39 and above, as a measure to force sites using a weak cryptography to migrate to better one, as peer of Google Announcement .

In order to resolve this security issue, you should contact your CA and generate a new certificate signed with a better hash.