CVE-2024-27094

OpenZeppelin Contracts Base64.encode has a memory-read flaw when input length is not a multiple of 3, risking corruption of the encoded output. This affects OpenZeppelin Contracts (and upgradeable) prior to versions 5.0.2 and 4.9.6. Remediation: upgrade to 5.0.2 or 4.9.6. No exploit details are p...

CVE-2022-31172

OpenZeppelin Contracts (library) is affected by CVE-2022-31172 in versions 4.1.0–4.7.1, where SignatureChecker.isValidSignatureNow may revert due to an incorrect assumption about Solidity 0.8 ABI decoding, especially when a target contract does not implement EIP-1271 as expected. The vulnerabilit...

CVE-2022-31153

OpenZeppelin Contracts for Cairo (v0.2.0) contains a bug that renders account contracts unusable on live networks. The issue affects all accounts (vanilla and Ethereum flavors) in the v0.2.0 release and only Goerli deployments are affected; StarkNet’s testing framework does not exhibit the faulty...

CVE-2023-34459

OpenZeppelin Contracts (versions 4.7.0–4.9.1) are affected by a multiproof forgery issue when using verifyMultiProof/verifyMultiProofCalldata/processMultiProof/processMultiProofCalldata. If the merkle tree includes a node with value 0 at depth 1 under the root, a adversarial or certain benign tre...

CVE-2022-35961

OpenZeppelin Contracts (ECDSA.recover and ECDSA.tryRecover) suffer signature malleability due to acceptance of EIP-2098 compact signatures in the single-bytes variants (not when using r, v, s or r, vs). This could allow a reused/double-submitted signature to bypass replay protection in contracts ...

CVE-2022-31170

OpenZeppelin Contracts (library for smart contract development) contains a vulnerability in versions 4.0.0 through 4.7.1 where ERC165Checker.supportsInterface may revert instead of returning false due to an incorrect assumption about Solidity 0.8 abi.decode. This affects contracts that use ERC165...

CVE-2022-35915

OpenZeppelin Contracts contains a vulnerability in the ERC165 supportsInterface logic where querying a target contract can cause unbounded gas consumption by returning a large amount of data. The issue is fixed in version 4.7.2; users are advised to upgrade. There are no public workarounds noted....

CVE-2022-35916

OpenZeppelin Contracts vulnerability CVE-2022-35916 affects cross-chain utilities for Arbitrum L2, specifically CrossChainEnabledArbitrumL2 and LibArbitrumL2. The issue classifies direct interactions of EOAs as cross-chain calls, even when not initiated on L1, due to how cross-chain interactions ...

CVE-2022-39384

OpenZeppelin Contracts (3.2.0–4.4.1) contain an initializer reentrancy issue caused by an exception used to support multiple inheritance, allowing reentry when an untrusted non-view external call is made during initialization. The impact is described as minor since upgradeable proxies are usually...

CVE-2023-23940

OpenZeppelin Contracts for Cairo contains a vulnerability in the account library: is_valid_eth_signature does not call finalize_keccak after verify_eth_signature, allowing a malicious sequencer to bypass signature validation and impersonate accounts (e.g., EthAccount). The issue affects StarkNet/...

CVE-2021-39167

OpenZeppelin Contracts TimelockController vulnerability (CVE-2021-39167) affects the TimelockController in OpenZeppelin’s smart contract library. The issue allows an actor with the executor role to escalate privileges, potentially gaining control over assets. Mitigation in public advisories recom...

CVE-2023-26488

OpenZeppelin Contracts ERC721Consecutive has a balance-update bug for batches of size 1, causing balanceOf to overflow. Root cause: balances not updated after mint/batch transfers. Impact is partial (balance overflow risk) and fixes were applied in version 4.8.2; update to 4.8.2 or later to remed...

CVE-2023-30542

CVE-2023-30542 concerns OpenZeppelin Contracts’ GovernorCompatibilityBravo: the propose entrypoint may allow a signatures array shorter than the calldatas array, causing extra calldatas to be ignored and potentially executing actions without calldata if the proposal passes. The event reflects wha...

CVE-2022-31198

OpenZeppelin Contracts: GovernorVotesQuorumFraction vulnerability where lowering quorum could make past defeated proposals executable if votes meet the new quorum. Affected: GovernorVotesQuorumFraction-based governors in OpenZeppelin Contracts. Root cause: quorum is a percentage of total supply, ...

CVE-2021-39168

OpenZeppelin's TimelockController vulnerability (OpenZeppelin Contracts) allows an actor with the executor role to escalate privileges. Affected: TimelockController in OpenZeppelin Contracts (readable as part of the OpenZeppelin Contracts library). Root cause: insufficient sanitization/controls a...

CVE-2023-49798

OpenZeppelin Contracts’ CVE-2023-49798 relates to a merge-conflict error in the Multicall.sol implementation that caused all subcalls to be executed twice in versions @openzeppelin/[email protected] and @openzeppelin/[email protected]. This duplication could lead to unintended duplicate o...

CVE-2021-41264

OpenZeppelin CVE-2021-41264 affects upgradeable contracts using UUPSUpgradeable due to uninitialized implementation contracts. The vulnerability is addressed in version 4.3.2 of @openzeppelin/contracts and @openzeppelin/contracts-upgradeable. If upgrading is not possible, a mitigation is to initi...

CVE-2023-34234

OpenZeppelin Contracts’ Governor-related vulnerability (CVE-2023-34234) allows an attacker to frontrun the creation of a proposal, enabling the attacker to become the proposer and repeatedly cancel proposals. Affected: Governor (v4.9.0) and GovernorCompatibilityBravo (since v4.3.0). Root cause: l...

CVE-2023-30541

OpenZeppelin Contracts vulnerability CVE-2023-30541: The TransparentUpgradeableProxy can fail to delegate a function if its selector clashes with the proxy’s own selectors, causing a revert during calldata decoding when signatures are incompatible. The issue has been fixed in version 4.8.3. Impac...

CVE-2024-45304

CVE-2024-45304 affects Cairo-Contracts (OpenZeppelin Cairo contracts for StarkNet). The issue, described as an OwnableTwoStep flaw, lets a pending owner gain control after the original owner renounces ownership, enabling an unintended transfer of ownership. Root cause: a flaw in the two-step owne...