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

Quick assessment

Affected
JuneAndGreen sm-crypto
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

sm-crypto是june01个人开发者的一个加密算法。 sm-crypto 0.3.14之前版本存在数据伪造问题漏洞，该漏洞源于SM2解密逻辑存在缺陷，可能导致私钥恢复。

CVSS 9.1 · Critical EPSS 0.24% · P13

Possible ATT&CK Techniques 1 AI

T1208
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I. Basic Information for CVE-2026-23966

Vulnerability Information
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Vulnerability Title
sm-crypto Affected by Private Key Recovery in SM2-PKE
Source: CVE Program / CVE List V5
Vulnerability Description
sm-crypto provides JavaScript implementations of the Chinese cryptographic algorithms SM2, SM3, and SM4. A private key recovery vulnerability exists in the SM2 decryption logic of sm-crypto prior to version 0.3.14. By interacting with the SM2 decryption interface multiple times, an attacker can fully recover the private key within approximately several hundred interactions. Version 0.3.14 patches the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5
Vulnerability Title
sm-crypto 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
sm-crypto是june01个人开发者的一个加密算法。 sm-crypto 0.3.14之前版本存在数据伪造问题漏洞，该漏洞源于SM2解密逻辑存在缺陷，可能导致私钥恢复。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
JuneAndGreen sm-crypto < 0.3.14 -

II. Public POCs for CVE-2026-23966

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III. Intelligence Information for CVE-2026-23966

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Same Patch Batch · JuneAndGreen · 2026-01-22 · 3 CVEs total

CVE-2026-23965 7.5 HIGH sm-crypto Affected by Signature Forgery in SM2-DSA
CVE-2026-23967 7.5 HIGH sm-crypto Affected by Signature Malleability in SM2-DSA

IV. Related Vulnerabilities

Same product: sm-crypto
Same vendor: JuneAndGreen
Same weakness: CWE-345

V. Comments for CVE-2026-23966

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