Fund loss via unchecked silent mint failure
Published Aug 13, 2026 · Updated Aug 13, 2026
Integer overflow in OpenZeppelin Confidential Contracts before 0.3.1 allows remote attackers to cause wrapped-token fund loss. ERC7984ERC20Wrapper's wrap and onTransferReceived functions transfer the underlying ERC-20 asset without detecting a silent _mint failure when the confidential euint64 total supply overflows. Reaching the condition requires filling the supply limit—about 18.4 trillion tokens at the default rate—and later deposits lose the underlying asset without receiving confidential tokens.
Summary
What happened
Integer overflow in OpenZeppelin Confidential Contracts before 0.3.1 allows remote attackers to cause wrapped-token fund loss. ERC7984ERC20Wrapper's wrap and onTransferReceived functions transfer the underlying ERC-20 asset without detecting a silent _mint failure when the confidential euint64 total supply overflows. Reaching the condition requires filling the supply limit—about 18.4 trillion tokens at the default rate—and later deposits lose the underlying asset without receiving confidential tokens.
The record
- CVE
- CVE-2026-73645
- Published
- Aug 13, 2026
- Updated
- Aug 13, 2026
- Vendor
- OpenZeppelin
- Product
- OpenZeppelin Confidential Contracts
- Classifications
- CWE-190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 13, 2026CVE publishedPublication date reported by the CVE source.
- Aug 13, 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?
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- Affected versionversion=< 0.3.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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