Is CVE-2026-2739 in the CISA KEV catalog?

No. CVE-2026-2739 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-2739?

CVE-2026-2739 has a CVSS v3 base score of 5.3 (Moderate).

What is the EPSS score for CVE-2026-2739?

CVE-2026-2739 has an EPSS score of 0.47% (37th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-2739?

Upgrade node-bn.js on debian unstable to 5.2.3+~5.2.0-1 or later.

CVE & CISA-KEV Catalog

CVE-2026-2739

MEDIUM

5.3

CVSS v3

NVD

Description

This affects versions of the package bn.js before 5.2.3. Calling maskn(0) on any BN instance corrupts the internal state, causing toString(), divmod(), and other methods to enter an infinite loop, hanging the process indefinitely.

CWE-835

How to fix

Remediation Available

node-bn.jsDebian

Fixed in:5.2.3+~5.2.0-1CVE-2026-2739

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

ConfidentialityNone

IntegrityNone

AvailabilityLow

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

Exploit Intelligence

0.47%probability of exploitation in 30 days

37thpercentile

Low risk: more likely to be exploited than 37% of all known CVEs.

References

Other references6

Related Vulnerabilities

Other CWE-835 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-13935	High	7.5	88%	-	Fix
CVE-2020-36227	High	7.5	78%	-	Fix
CVE-2022-0778	High	7.5	71%	-	Fix
CVE-2019-14241	High	7.5	70%	-	-
CVE-2017-16944	High	7.5	63%	-	Fix
CVE-2024-20353	High	8.6	63%	KEV	-

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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 2026-02-20.