CVE-2026-23966: sm-crypto Affected by Private Key Recovery in SM2-PKE

January 21, 2026 (updated January 22, 2026)

A private key recovery vulnerability exists in the SM2 decryption logic of sm-crypto. By interacting with the SM2 decryption interface multiple times, an attacker can fully recover the private key within approximately several hundred interactions.

References

github.com/JuneAndGreen/sm-crypto
github.com/JuneAndGreen/sm-crypto/commit/b1c824e58fdf1eaa73692c124a095819a8c45707
github.com/JuneAndGreen/sm-crypto/security/advisories/GHSA-pgx9-497m-6c4v
github.com/advisories/GHSA-pgx9-497m-6c4v
nvd.nist.gov/vuln/detail/CVE-2026-23966

Code Behaviors & Features

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