Grin before 3.1.0 allows attackers to adversely affect availability of data on a Mimblewimble blockchain.Referenceshttps://github.com/mimblewimble/grin/pull/3236https://github.com/mimblewimble/grin-security/blob/master/CVEs/CVE-2020-12439.mdhttps://github.com/mimblewimble/grin/issues/3235
