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Fencer Vulns
medium 5.7

CVE-2019-16762 json

Validator parsing discrepancy due to string encoding in NPM slpjs

published 2019-11-15 6 y ago modified 2026-07-08 4 mo ago also GHSA-425c-ccf3-3jrr , EUVD-2019-0725

cvss
5.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits
0
none known

Summary

A specially crafted Bitcoin script can cause a discrepancy between the specified SLP consensus rules and the validation result of the slpjs npm package. An attacker could create a specially crafted Bitcoin script in order to cause a hard-fork from the SLP consensus. Affected users can upgrade to any version >= 0.21.4.

Patch / fix

  • npm slpjs 0.21.4
  • simpleledger slpjs 0.21.4

Exploit prediction

1.10% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/simpleledger/slpjs/security/advisories/GHSA-425c-ccf3-3jrr referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.7 CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:H
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:H
NVD 2.0 4.9 AV:N/AC:M/Au:S/C:N/I:P/A:P
GitHub 3.1 5.7 CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:H

Affected packages

ecosystem package affected fixed in
npm slpjs
<0.21.4
0.21.4

Affected products

  • simpleledger slpjs

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.