VulnerabilityDeferred
CVE-2026-2739
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.
MEDIUM 5.5EPSS 0.47%
Does this matter?
Lower severity and a low EPSS score (0.47%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 4.0
- 5.5 MEDIUMCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.47% probability · 39th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-835
- Source
- report@snyk.io
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.