ERC7984ERC20Wrapper: once a wrapper is filled, subsequent wrap requests do not revert and result in loss of funds.

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 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 · score source

EPSS

• CVE-2026-73645: 0.52% estimated exploitation activity in the next 30 days; percentile 44.47 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact The ERC7984 contract tracks total supply using a confidential euint64 value. If a call to the internal mint function would result in the total supply overflowing, the call fails silently. The wrap and onTransferReceived functions in ERC7984ERC20Wrapper assume that mint won't fail silently and do not check the return value. If the mint function fails silently, users do not receive the confidential wrapped token but still send the underlying token, resulting in a loss of funds. By default (without overriding rate(), the wrapper fills up after wrapping ~18.4 trillion tokens. There are very few tokens of value with sufficient total supply to result in the filling of the wrapper. That said, we recommend upgrading to 0.3.1 to remove this issue. Patches This issue has been patched in the 0.3.1 release.

Published by the source

5 Jan 2026, 19:57 UTC

Last modified by the source

13 Aug 2026, 18:51 UTC

Source last checked

26 Oct 2026, 13:01 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-hqf9-8xv5-x8xw

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-hqf9-8xv5-x8xw

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# Patch Next advisory brief: CVE-2026-73645

Advisory: ERC7984ERC20Wrapper: once a wrapper is filled, subsequent wrap requests do not revert and result in loss of funds.
IDs: CVE-2026-73645, GHSA-hqf9-8xv5-x8xw
Record: https://patchnext.com/advisories/cve-2026-73645 (revision 3, source checked 26 Oct 2026, 13:01 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.6)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @openzeppelin/confidential-contracts 0.3.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @openzeppelin/confidential-contracts: affected <= 0.3.0; fixed in 0.3.1

## Suggested inspection (read-only)
- `npm ls @openzeppelin/confidential-contracts --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 @openzeppelin/confidential-contracts.
- 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-hqf9-8xv5-x8xw (OSV record GHSA-hqf9-8xv5-x8xw lists affected ranges: npm @openzeppelin/confidential-contracts >=0 <0.3.1 (fixed))
- Verified: https://github.com/advisories/GHSA-hqf9-8xv5-x8xw (GitHub-reviewed advisory GHSA-hqf9-8xv5-x8xw lists affected ranges: npm @openzeppelin/confidential-contracts >=0 <=0.3.0)

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