CVE-2026-2739

CVSS 6.9 MEDIUMEPSS 0.5%CWE-835

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.9EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

20 Feb 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

Affected products

n/a · bn.js

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References

https://gist.github.com/Kr0emer/02370d18328c28b5dd7f9ac880d22a91 https://github.com/indutny/bn.js/commit/33df26b5771e824f303a79ec6407409376baa64b https://github.com/indutny/bn.js/issues/186 https://github.com/indutny/bn.js/issues/316 https://github.com/indutny/bn.js/pull/317 https://security.snyk.io/vuln/SNYK-JS-BNJS-15274301