How severe is CVE-2026-23967?

CVE-2026-23967 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-23967 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-23967?

CVE-2026-23967 affects Juneandgreen Sm-crypto. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-23967?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-23967 have an EU (EUVD) identifier?

Yes. CVE-2026-23967 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3675.

When was CVE-2026-23967 published?

CVE-2026-23967 was published on 2026-01-22 and last updated on 2026-06-17.

CVE-2026-23967

CVE-2026-23967 is a high-severity vulnerability in Juneandgreen Sm-crypto with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-347.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3675
Weakness: CWE-347
Affected product: Juneandgreen Sm-crypto
Published: 2026-01-22
Last modified: 2026-06-17

Description

sm-crypto provides JavaScript implementations of the Chinese cryptographic algorithms SM2, SM3, and SM4. A signature malleability vulnerability exists in the SM2 signature verification logic of the sm-crypto library prior to version 0.3.14. An attacker can derive a new valid signature for a previously signed message from an existing signature. Version 0.3.14 patches the issue.

Frequently asked questions

What is CVE-2026-23967?: sm-crypto provides JavaScript implementations of the Chinese cryptographic algorithms SM2, SM3, and SM4. A signature malleability vulnerability exists in the SM2 signature verification logic of the sm-crypto library prior to version 0.3.14. An attacker can derive a new valid signature for a previously signed message from an existing signature. Version 0.3.14 patches the issue.
How severe is CVE-2026-23967?: CVE-2026-23967 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-23967 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-23967?: CVE-2026-23967 affects Juneandgreen Sm-crypto. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-23967?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-23967 have an EU (EUVD) identifier?: Yes. CVE-2026-23967 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3675.
When was CVE-2026-23967 published?: CVE-2026-23967 was published on 2026-01-22 and last updated on 2026-06-17.

References

https://github.com/JuneAndGreen/sm-crypto/security/advisories/GHSA-qv7w-v773-3xqm

Affected products (1)

cpe:2.3:a:juneandgreen:sm-crypto:*:*:*:*:*:*:*:*

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