Yes. github.com/square/go-jose (Go): upgrade to 1.0.4 or later; gopkg.in/square/go-jose.v1 (Go): upgrade to 1.0.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2016-9121?
Check whether you run github.com/square/go-jose (Go) or gopkg.in/square/go-jose.v1 (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
github.com/square/go-jose (Go): upgrade to 1.0.4 or later
go get github.com/square/go-jose@v1.0.4
gopkg.in/square/go-jose.v1 (Go): upgrade to 1.0.4 or later