Description
OpenZeppelin Contracts is a library for secure smart contract development. The `Base64.encode` function encodes a `bytes` input by iterating over it in chunks of 3 bytes. When this input is not a multiple of 3, the last iteration may read parts of the memory that are beyond the input buffer. The vulnerability is fixed in 5.0.2 and 4.9.6.
Analysis and contextual insights are available on OpenCVE Cloud.
Remediation
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2024-0602 | OpenZeppelin Contracts is a library for secure smart contract development. The `Base64.encode` function encodes a `bytes` input by iterating over it in chunks of 3 bytes. When this input is not a multiple of 3, the last iteration may read parts of the memory that are beyond the input buffer. The vulnerability is fixed in 5.0.2 and 4.9.6. |
Github GHSA |
GHSA-9vx6-7xxf-x967 | OpenZeppelin Contracts base64 encoding may read from potentially dirty memory |
References
History
Thu, 04 Dec 2025 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Openzeppelin contracts
Openzeppelin contracts Upgradeable |
|
| CPEs | cpe:2.3:a:openzeppelin:contracts:*:*:*:*:*:node.js:*:* cpe:2.3:a:openzeppelin:contracts_upgradeable:*:*:*:*:*:node.js:*:* |
|
| Vendors & Products |
Openzeppelin contracts
Openzeppelin contracts Upgradeable |
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2024-08-02T19:35:12.184Z
Reserved: 2024-02-19T14:43:05.993Z
Link: CVE-2024-27094
Updated: 2024-08-02T00:27:58.413Z
Status : Analyzed
Published: 2024-03-21T02:52:18.063
Modified: 2025-12-04T20:13:27.070
Link: CVE-2024-27094
No data.
OpenCVE Enrichment
Updated: 2025-07-12T22:45:27Z
Weaknesses
EUVD
Github GHSA