CVE-2022-50237: dalek-cryptography ed25519-dalek
CVSS: 5.9v3.1MediumDeferred
AliasesUBUNTU-CVE-2022-50237GHSA-w5vr-6qhr-36ccRUSTSEC-2022-0093
Published 28-07-2025Last modified 28-07-2025
Vulnerability summary
CVE-2022-50237 is a medium (CVSS 5.9) vulnerability in dalek-cryptography ed25519-dalek. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.6% of scored vulnerabilities.
CVSS score
5.9/10
010
Medium · v3.1 (CVE.org)EPSS score
0.20%
0%100%
Low · +0.02 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 28-07-2025PublishedVulnerability first disclosed.
- 28-07-2025Last modifiedVulnerability information updated.
Description
The ed25519-dalek crate before 2 for Rust allows a double public key signing function oracle attack. The Keypair implementation leads to a simple computation for extracting a private key.
CVSS metrics
4 scores · 4 sources · 1 versionMedium 5.9Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:NSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
- OSV · Crates.ioEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
- NVDNIST5.9MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
EPSS trend
Probability
0.20%
Chance of exploitation in the next 30 days
Percentile
10%
Versus all other CVEs
30-day change
+0.02 pp
From 0.18% on 21-09-2026
21-09-202621-10-2026
EPSS score0.20%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Crates.Io1 product
- ed25519-dalek< 2.0.0 | ≥ 0.0.0-0, < 2.0.0
Dalek-cryptography1 product
Ubuntu1 product
- rust-curve25519-dalekAll versions (No fix recorded)
3 vendors · 3 products
