Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2020-12439

20
FAUCET Score

CVE-2020-12439 is a denial-of-service vulnerability affecting Grin versions prior to 3.1.0, allowing attackers to disrupt the availability of data on a Mimblewimble blockchain. With a CVSS score of 5.3 (Medium), it is easily exploitable over the network with low attack complexity, though it only impacts availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.1.0CPE matchmatch criteria
cpe:2.3:a:grin:grin:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.55%
Probability of exploitation in next 30 days
EPSS Percentile
72.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0155 is in the 56th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
rustpatch availablevia ghsa
Product: grinFixed in: 3.1.0

Vendor Advisories (1)

rustGHSA-6x52-88cq-55q5medium

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

May 24, 2022

References

github.com / mimblewimble/grin/issues/3235
Issue TrackingPatchThird Party Advisory
github.com / mimblewimble/grin/pull/3236
PatchThird Party Advisory
github.com / mimblewimble/grin-security/blob/master/CVEs/CVE-2020-12439.md
Third Party Advisory