CVEvulnerability

CVE-2023-40014

5.3 MEDIUM Published 2023-08-10 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2023-08-10
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weaknesses
CWE-116

Description

OpenZeppelin Contracts is a library for secure smart contract development. Starting in version 4.0.0 and prior to version 4.9.3, contracts using `ERC2771Context` along with a custom trusted forwarder may see `_msgSender` return `address(0)` in calls that originate from the forwarder with calldata shorter than 20 bytes. This combination of circumstances does not appear to be common, in particular it is not the case for `MinimalForwarder` from OpenZeppelin Contracts, or any deployed forwarder the team is aware of, given that the signer address is appended to all calls that originate from these forwarders. The problem has been patched in v4.9.3.

Affected configurations

• openzeppelin openzeppelin contracts (>= 4.0.0 < 4.9.3) • openzeppelin openzeppelin contracts-upgradable (>= 4.0.0 < 4.9.3)

Related

Weakness · CWE (1)

  • CWE-116 Improper Encoding or Escaping of Output weakness

References