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CVE-2022-50237

MEDIUM
5.9
CVSS Score
Published: July 28, 2025 at 12:00 AM UTC
Updated: June 17, 2026 at 05:23 AM UTC
1 product affected across 1 vendorEd25519-dalek

Using ed25519-dalek by dalek-cryptography?

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Severity
MEDIUM5.9
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ed25519-dalek· Dalek Cryptographycargo
60%
v < 2
Affected range stops below 2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

Source: [email protected]
https://crates.io/crates/ed25519-dalek
Source: [email protected]
https://github.com/MystenLabs/ed25519-unsafe-libs
Source: [email protected]
https://rustsec.org/advisories/RUSTSEC-2022-0093.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.9MEDIUMmitre
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-497

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