CVE-2022-31170Public exploitNetwork attack vector

Smart-contract call reverts via invalid Boolean decoding

Published Jul 21, 2022 · Updated Apr 23, 2025

Improper input validation in OpenZeppelin Contracts 4.0.0 through 4.7.0 allows remote attackers to revert smart-contract calls. ERC165Checker.supportsInterface passes a target contract's return data to Solidity 0.8 abi.decode, which reverts on Boolean values other than 0 or 1 instead of returning false. Exploitation requires a consuming contract to query a nonconforming target and to handle unsupported interfaces without an intentional revert.

CVSS severity7.5
High
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in OpenZeppelin Contracts 4.0.0 through 4.7.0 allows remote attackers to revert smart-contract calls. ERC165Checker.supportsInterface passes a target contract's return data to Solidity 0.8 abi.decode, which reverts on Boolean values other than 0 or 1 instead of returning false. Exploitation requires a consuming contract to query a nonconforming target and to handle unsupported interfaces without an intentional revert.

The record

CVE
CVE-2022-31170
Published
Jul 21, 2022
Updated
Apr 23, 2025
Vendor
OpenZeppelin
Product
OpenZeppelin Contracts
Classifications
CWE-20, CWE-252
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 4.0.0, < 4.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenZeppelin · OpenZeppelin Contractsversion=>= 4.0.0, < 4.7.1

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-252Unchecked Return Value

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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