We began experiencing an issue with the X-Hubspot-Signature v2 validation earlier today beginning at 10am EST. Our computed signatures no longer match the signatures that we receive from Hubspot.
I did spot the Signature v3 announcement from last week here: Introducing version 3 of Webhook signatures
Seemed suspicious, but we haven’t had any issues until this morning. Our implementation is the same as described in my post back on Dec 13, 2019. Did anything change today on the Hubspot side related to v2 signatures? Or perhaps treatment of URL params?
I have gone through a number of variations to attempt to reverse engineer our signature computation to match what we receive from Hubspot but have had no luck thus far.