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CVE-2022-50237

20
FAUCET Score

CVE-2022-50237 is a medium-severity vulnerability in the ed25519-dalek Rust crate prior to version 2, allowing a double public key signing function oracle attack that can extract a private key. The attack requires high attack complexity and local access, but if successful, it leads to a complete compromise of confidentiality. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
Dalek-CryptographyEd25519-Dalek
>= 0, < 2CNA affecteddefault unaffected

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.4
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.18%
Probability of exploitation in next 30 days
EPSS Percentile
8.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0018 is in the 5th percentile among its peer group of 1,595 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 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 (1)

rustpatch availablevia ghsa
Product: ed25519-dalekFixed in: 2.0.0

Vendor Advisories (2)

redhatCVE-2022-50237Moderate

ed25519-dalek: ed25519-dalek: Private Key Extraction Vulnerability

Jul 28, 2025
rustGHSA-w5vr-6qhr-36ccmedium

`ed25519-dalek` Double Public Key Signing Function Oracle Attack

Aug 14, 2023

References

crates.io / crates/ed25519-dalek
github.com / MystenLabs/ed25519-unsafe-libs
rustsec.org / advisories/RUSTSEC-2022-0093.html