Grin before 3.1.0 allows attackers to adversely affect availability of data on a Mimblewimble blockchain.
https://github.com/mimblewimble/grin/pull/3236
https://github.com/mimblewimble/grin/issues/3235
https://github.com/mimblewimble/grin-security/blob/master/CVEs/CVE-2020-12439.md
Source: Mitre, NVD
Published: 2020-05-05
Updated: 2026-06-17
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Severity: Medium
Base Score: 5.3
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS: 0.00334