What’s Vulnerable › Vulnerabilities

CVE-2020-12439

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-05-05 · updated 2026-06-17
• Weakness: CWE-404

Description

Grin before 3.1.0 allows attackers to adversely affect availability of data on a Mimblewimble blockchain.

Affected products

• Grin: before 3.1.0 — fixed in 3.1.0

How to fix

Upgrade to a fixed version: Grin 3.1.0. Check the vendor advisory for mitigations.

References

• https://github.com/mimblewimble/grin-security/blob/master/CVEs/CVE-2020-12439.md
• https://github.com/mimblewimble/grin/issues/3235
• https://github.com/mimblewimble/grin/pull/3236
• https://github.com/mimblewimble/grin-security/blob/master/CVEs/CVE-2020-12439.md
• https://github.com/mimblewimble/grin/issues/3235
• https://github.com/mimblewimble/grin/pull/3236

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