CVE-2026-56744Network attack vectorHinoki check available

Payment redirection via unchecked storage-supplied output scripts

Published Sep 24, 2026 · Updated Sep 24, 2026

Improper transaction validation in @bsv/wallet-toolbox before 2.4.0 allows malicious storage providers to redirect signed payments. The main, client, and mobile packages sign non-change locking scripts returned by StorageClient without comparing them with createAction requests. Exploitation requires an active malicious or compromised remote storage provider and can transfer funds to substituted or injected outputs while the intended recipient remains displayed.

CVSS severityUnavailable
Unscored
EPSS probability0.30%
Next 30 days · Oct 18, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper transaction validation in @bsv/wallet-toolbox before 2.4.0 allows malicious storage providers to redirect signed payments. The main, client, and mobile packages sign non-change locking scripts returned by StorageClient without comparing them with createAction requests. Exploitation requires an active malicious or compromised remote storage provider and can transfer funds to substituted or injected outputs while the intended recipient remains displayed.

The record

CVE
CVE-2026-56744
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
BSV Blockchain
Product
@bsv/wallet-toolbox
Classifications
T1565.001
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.1.47, < 2.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

BSV Blockchain · @bsv/wallet-toolboxversion=>= 1.1.47, < 2.4.0
BSV Blockchain · @bsv/wallet-toolbox-mobileversion=>= 1.3.21, < 2.4.0
BSV Blockchain · @bsv/wallet-toolbox-clientversion=>= 1.1.47, < 2.4.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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