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CVE-2020-28498

23
FAUCET Score

CVE-2020-28498 is a cryptographic vulnerability in the 'elliptic' package, specifically affecting versions prior to 6.5.4, due to a missing public key validation check in its secp256k1 implementation. This flaw, rated Medium (CVSS 6.8), allows an unauthenticated attacker to potentially reveal a private key after multiple Elliptic Curve Diffie-Hellman (ECDH) operations, with high impact on confidentiality. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.5.4CPE matchmatch criteria
cpe:2.3:a:indutny:elliptic:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

6.8MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.24%
Probability of exploitation in next 30 days
EPSS Percentile
66.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0124 is in the 33rd percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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
npmpatch availablevia ghsa
Product: ellipticFixed in: 6.5.4

Vendor Advisories (1)

npmGHSA-r9p9-mrjm-926wmedium

Elliptic Uses a Broken or Risky Cryptographic Algorithm

Mar 8, 2021

References

github.com / christianlundkvist/blog/blob/master/2020_05_26_secp256k1_twist_attacks/secp256k1_twist_attacks.md
Third Party Advisory
github.com / indutny/elliptic/commit/441b7428b0e8f6636c42118ad2aaa186d3c34c3f
PatchThird Party Advisory
snyk.io / vuln/SNYK-JAVA-ORGWEBJARSNPM-1069836
PatchThird Party Advisory
snyk.io / vuln/SNYK-JS-ELLIPTIC-1064899
PatchThird Party Advisory