{"id":"GHSA-29h2-jr22-frmh","revision":null,"records":[{"revision":"70ad32bfed17420a8b0cb3bd0a17ad9a","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-29h2-jr22-frmh","aliases":[],"title":"OpenZeppelin Confidential Contracts `VestingWalletConfidential`: a malicious ERC-7984 token is able to extract private data from the vesting wallet","description":"### Impact\n\nTwo locations consume an encrypted handle returned by an untrusted external party and use it without verifying that the party is ACL-authorized on it.\n\n#### `VestingWalletConfidential`\n\nMalicious users can call `release` with a malicious token. This token could return an alternative handle on `confidentialBalanceOf`, which represents the balance of the vesting wallet on an alternative ERC-7984 token (or any other handle that the vesting wallet has access to). The vesting wallet does not check that the token has ACL access and grants access to a new handle derived from the returned handle.\n\nEffectively, this bug allows a malicious user to gain information about any private `euint64` handle that the vesting wallet has access to via a malicious ERC-7984 token. There is no loss of funds.\n\n#### ERC7984\n\nOn a transfer with callback, `ERC7984` uses the `ebool` returned by the\nrecipient's `IERC7984Receiver.onConfidentialTransferReceived` to drive the refund\nlogic, without checking that the recipient has ACL access to it. A malicious recipient\ncan return any `ebool` the token has access to and recover its plaintext from the\nrefund result, which the token grants the caller access to. The leak is limited\nto `ebool` handles (the value is only used as an `FHE.select` condition), and\nthere is no loss of funds.\n\n### Patches\n\nBoth issues were fixed in the same patch releases: v0.5.2, v0.4.2, v0.3.2\n\n- `VestingWalletConfidential`: 93e75ceed2b9648f53f9d133f431064353456805 (#423).\n- `ERC7984` transfer callback: fe0863af2c9dce7614acce98720a913bf6a767a5 (#428), with follow-up ee47edf189ab681cebdad18bfb53dee541987be2 (#431) permitting an uninitialized returned handle.","state":0,"publishedAt":"2026-09-25T19:31:08+00:00","modifiedAt":"2026-09-25T19:45:09.7049489+00:00","affected":[{"ecosystem":"npm","name":"@openzeppelin/confidential-contracts","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.3.2"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@openzeppelin/confidential-contracts","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.4.0-rc.0"},{"kind":"fixed","version":"0.4.2"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@openzeppelin/confidential-contracts","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.5.0-rc.0"},{"kind":"fixed","version":"0.5.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/security/advisories/GHSA-29h2-jr22-frmh","https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/pull/423","https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/pull/428","https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/pull/431","https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/commit/93e75ceed2b9648f53f9d133f431064353456805","https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/commit/ee47edf189ab681cebdad18bfb53dee541987be2","https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/commit/fe0863af2c9dce7614acce98720a913bf6a767a5","https://github.com/OpenZeppelin/openzeppelin-confidential-contracts","https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/releases/tag/v0.3.2","https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/releases/tag/v0.4.2","https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/releases/tag/v0.5.2"],"sourceUrl":"https://github.com/advisories/GHSA-29h2-jr22-frmh","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-29h2-jr22-frmh","identifiers":["GHSA-29h2-jr22-frmh"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-9db698e4659747149ec1092e3d34a5a1","complete":true,"records":13764,"lastAttemptAt":"2026-11-12T10:56:11.9015763+00:00","lastSuccessAt":"2026-11-12T09:56:01.656+00:00","error":null,"lastVerifiedAt":"2026-11-12T09:56:01.656+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13817,"expectedIdentifiers":13817,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-12T10:55:30.8237330+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-12T10:55:30.823733+00:00","lastSuccessAt":"2026-11-12T10:55:31.0564011+00:00","error":null,"lastVerifiedAt":"2026-11-12T10:55:31.0564012+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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