Is CVE-2026-23966 in the CISA KEV catalog?

No. CVE-2026-23966 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-23966?

CVE-2026-23966 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2026-23966?

CVE-2026-23966 has an EPSS score of 0.21% (11th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-23966?

Upgrade sm-crypto to 0.3.14 or later.

CVE & CISA-KEV Catalog

CVE-2026-23966

CRITICAL

9.1

CVSS v3

NVD

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.

CWE-345

How to fix

Remediation Available

sm-cryptoNVD

Affected:< 0.3.14Fixed in:0.3.14CVE-2026-23966derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploit Intelligence

0.21%probability of exploitation in 30 days

11thpercentile

Low risk: more likely to be exploited than 11% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

github.com

Related Vulnerabilities

Other CWE-345 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-38831	High	7.8	98%	KEV + Ransom	Fix
CVE-2016-4553	High	8.6	80%	-	Fix
CVE-2016-4554	High	8.6	39%	-	Fix
CVE-2023-35719	Medium	6.8	26%	-	-
CVE-2022-26871	Critical	9.8	20%	KEV	-
CVE-2014-4936	High	9.3	17%	-	-

Embed a live status badge for CVE-2026-23966

Markdown

[![CVE-2026-23966](https://tridentstack.com/cve/badge/CVE-2026-23966.svg)](https://tridentstack.com/cve/CVE-2026-23966)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-23966"><img src="https://tridentstack.com/cve/badge/CVE-2026-23966.svg" alt="CVE-2026-23966"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-02-25.