Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-73567— sm-crypto: Predictable SM2 key generation in Node.js: default RNG uses Math.random + wall clock

CVSS 9.1 · Critical EPSS 0.32% · P25

Affected Version Matrix 1

VendorProductVersion RangeStatus
JuneAndGreensm-crypto< 0.5.0affected
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-73567

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
sm-crypto: Predictable SM2 key generation in Node.js: default RNG uses Math.random + wall clock
Source: CVE Program / CVE List V5
Vulnerability Description
sm-crypto provides JavaScript implementations of the Chinese cryptographic algorithms SM2, SM3, and SM4. Prior to 0.5.0, the default no-argument sm2.generateKeyPairHex() path in Node.js uses the module-wide SecureRandom instance in src/sm2/utils.js, supplied by jsbn@1.1.0, which seeds an ARC4 stream from Math.random() and new Date().getTime() because window.crypto.getRandomValues is unavailable even though globalThis.crypto exists. An attacker who can observe the process's Math.random() outputs and estimate the key-generation time can reconstruct the seed, recover generated SM2 private keys, and predict signing ephemeral scalars used to forge signatures. This issue is fixed in version 0.5.0.
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
使用具有密码学弱点缺陷的PRNG
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
JuneAndGreensm-crypto < 0.5.0 -

II. Public POCs for CVE-2026-73567

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 9743 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-73567

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-73567 (1)

Vendor Advisories for CVE-2026-73567 (1)

IV. Related Vulnerabilities

Same product: sm-crypto
Same vendor: JuneAndGreen
Same weakness: CWE-338

V. Comments for CVE-2026-73567

No comments yet

Leave a comment