CVE-2026-73567

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Source
https://cve.org/CVERecord?id=CVE-2026-73567
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73567.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-73567
Aliases
Published
2026-08-13T17:40:54Z
Modified
2026-10-28T02:30:43Z
Severity
  • 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
sm-crypto: Predictable SM2 key generation in Node.js: default RNG uses Math.random + wall clock
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-338"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73567.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "fixed":  "0.5.0"
                        }
                    ],
                    "source":  "AFFECTED_FIELD",
                    "strategy":  "StringRangeExpression"
                }
            ]
        },
        {
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "introduced":  "4"
                        },
                        {
                            "fixed":  "0.5.0"
                        },
                        {
                            "fixed":  "0.5.0"
                        }
                    ],
                    "source":  "DESCRIPTION"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/juneandgreen/sm-crypto

Affected ranges

Type
GIT
Repo
https://github.com/juneandgreen/sm-crypto
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
1f9bd7bd160c24efd9c26c8f7fda997c68c823d0
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "fixed":  "1f9bd7bd160c24efd9c26c8f7fda997c68c823d0"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73567.json"