CVE-2026-73645 json
OpenZeppelin Confidential Contracts ERC7984ERC20Wrapper: once a wrapper is filled, subsequent wrap requests do not revert and result in loss of funds.
published 2026-01-05 10 mo ago modified 2026-10-24 15 d ago also GHSA-hqf9-8xv5-x8xw , EUVD-2026-58188
- cvss
- 6.6
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
OpenZeppelin Confidential Contracts is an experimental library for developing applications on the Zama fhEVM. Prior to 0.3.1, the ERC7984 contract tracked confidential total supply with an euint64 value, and an overflowing internal _mint operation could fail silently. The wrap and onTransferReceived functions in contracts/token/ERC7984/extensions/ERC7984ERC20Wrapper.sol did not handle that failure, so a user could transfer the underlying token without receiving the corresponding confidential wrapped token. With the default rate(), the wrapper fills after approximately 18.4 trillion tokens, and subsequent wrapping requests can cause loss of funds. This issue is fixed in version 0.3.1.
Patch / fix
- npm @openzeppelin/confidential-contracts 0.3.1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.6 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U |
| CNA | 4.0 | 6.6 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @openzeppelin/confidential-contracts | <0.3.1 |
0.3.1 |
Affected products
- OpenZeppelin openzeppelin-confidential-contracts
Classification
- Weakness
-
- CWE-190 Integer Overflow or Wraparound
References
- github.com /OpenZeppelin/openzeppelin-confidential-contracts/pull/271
- github.com /OpenZeppelin/openzeppelin-confidential-contracts/commit/c620d4386021dde63ae3ea1507dee8543791134a
-
github.com
/OpenZeppelin/openzeppelin-confidential-contracts/security/advisories/GHSA-hqf9-8xv5-x8xw
web
- github.com /OpenZeppelin/openzeppelin-confidential-contracts/releases/tag/v0.3.1
-
github.com
/OpenZeppelin/openzeppelin-confidential-contracts
package
Sources
- CVE List CVE-2026-73645
- GitHub Advisory GHSA-hqf9-8xv5-x8xw
- NVD CVE-2026-73645
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