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Unratedamended

Undefined Behavior in zencashjs

GHSA-xfrc-7mj2-5xh9

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (zencashjs 1.2.0), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
not scored
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

Versions of zencashjs prior to 1.2.0 may cause loss of funds when used with cryptocurrency wallets. The package relies on a string comparison of the first two characters of a Horizen address to determine the destination address type of a transaction (P2PKH or P2SH). Due to the base58 address prefixes chosen in Horizen there exists the possibility of a clash of address prefixes for testnet P2PKH and mainnet P2SH addresses, testnet P2PKH addresses start with “zt” while a subset of mainnet P2SH addresses can also start with “zt”. The package interprets transactions sent to a “zt” P2SH address on mainnet as P2PKH transactions erroneously. Any funds sent to a mainnet P2SH multisignature address starting with “zt” will be sent to the wrong address and be lost. Recommendation Upgrade to version 1.2.0 or later.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from ghsa record GHSA-xfrc-7mj2-5xh9

  2. Revision 1 · created ·

    Published from osv record GHSA-xfrc-7mj2-5xh9

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: GHSA-xfrc-7mj2-5xh9

Advisory: Undefined Behavior in zencashjs
IDs: GHSA-xfrc-7mj2-5xh9
Record: https://patchnext.com/advisories/ghsa-xfrc-7mj2-5xh9 (revision 2, source checked 26 Oct 2026, 12:15 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Unrated
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: zencashjs 1.2.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm zencashjs: affected < 1.2.0; fixed in 1.2.0

## Suggested inspection (read-only)
- `npm ls zencashjs --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on zencashjs.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-xfrc-7mj2-5xh9 (OSV record GHSA-xfrc-7mj2-5xh9 lists affected ranges: npm zencashjs >=0 <1.2.0 (fixed))
- Verified: https://github.com/advisories/GHSA-xfrc-7mj2-5xh9 (GitHub-reviewed advisory GHSA-xfrc-7mj2-5xh9 lists affected ranges: npm zencashjs >=0 <1.2.0)

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