bitcoinj library up to 0.17.0 Bitcoin Protocol ScriptExecution.java. ScriptExecution.correctlySpends signature verification

Summaryinfo

A vulnerability identified as problematic has been detected in bitcoinj library up to 0.17.0. This impacts the function ScriptExecution.correctlySpends of the file core/src/main/java/org/bitcoinj/script/ScriptExecution.java. of the component Bitcoin Protocol Handler. This manipulation causes signature verification. The identification of this vulnerability is CVE-2026-44714. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in bitcoinj library up to 0.17.0. It has been declared as problematic. Affected by this vulnerability is the function ScriptExecution.correctlySpends of the file core/src/main/java/org/bitcoinj/script/ScriptExecution.java. of the component Bitcoin Protocol Handler. The manipulation with an unknown input leads to a signature verification vulnerability. The CWE definition for the vulnerability is CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. As an impact it is known to affect integrity. The summary by CVE is:

The bitcoinj library is a Java implementation of the Bitcoin protocol. Prior to 0.17.1, ScriptExecution.correctlySpends() contains two fast-path verification bugs for standard P2PKH and native P2WPKH spends in core/src/main/java/org/bitcoinj/script/ScriptExecution.java. In both branches, bitcoinj verifies an attacker-controlled signature/public-key pair but fails to verify that the public key is the one committed to by the output being spent. As a result, any attacker keypair can satisfy bitcoinj's local verification for arbitrary P2PKH and P2WPKH outputs. This vulnerability is fixed in 0.17.1.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-44714 since 05/07/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 0.17.1 eliminates this vulnerability. Applying the patch 2bc5653c41d260d840692bc554690d4d79208f9c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-30571). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Software Library

Vendor

• bitcoinj

Name

• library

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17.0

License

• open-source

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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