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Vulnerabilities

Vulnerability · CVE-2022-50237

The ed25519-dalek crate before 2 for Rust allows a double public key signing function oracle attack.

Published Jul 28, 2025 · catalog updated Jul 28, 2025 · The ed25519-dalek crate before

Last checked Oct 24, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2022-50237. EPSS is 0.20%. Act only if a listed version of The ed25519-dalek crate before is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (The ed25519-dalek crate before).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.20%
Remediation
Version ranges on file
Affected products
vendor dalek-cryptography ed25519-dalek 0 <2

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor dalek-cryptography ed25519-dalek 0 <20 <2

How to fix CVE-2022-50237

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2022-50237. EPSS is 0.20%. Act only if a listed version of The ed25519-dalek crate before is installed.

Which versions are affected?

Compare what you have installed with dalek-cryptography ed25519-dalek 0 <2 0 <2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.20%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 28, 2025 · EUVD

    Detected

    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.

  2. Jul 28, 2025 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2022-50237

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2022-50237

    30-day exploitation probability 0.20%

    first.org
  • EUVDVulnerability recordEUVD-2022-55212

    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.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 24, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 24, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 21, 2026