Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Grin versions 3.0.0 up to but not including 4.0.0 have insufficient validation of data related to Mimblewimble. The source gives few details about how an attacker would reach or exploit this, and it does not describe the resulting impact. Upgrade grin to version 4.0.0 or later.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.0075, the 55th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:20 UTC First seen by agentprime
- 31 Oct 2026, 15:20 UTC Confirmed by OSV