Foresight News reports that the Zcash Foundation has dropped Zebra version 4.5.1, patching a critical consensus security flaw (GHSA-2prc-cj5x-4443). All node operators are strongly advised to upgrade immediately. This vulnerability stemmed from an incomplete fix for the P2SH Sigop counting issue in the previous version (4.5.0), leaving a risk of consensus forks. Currently, there’s no known workaround; upgrading is the only way to secure your setup.