CVE-2026-62334 Details
Description
OpenVM is a performant and modular zkVM framework built for customization and extensibility. Before 1.7.0 in the 1.x line and in affected 2.0 and 2.1 prereleases, `OpenVmHalo2Verifier.verify` constructs raw proof calldata from user-controlled `proofData`, performs a `staticcall` to `address(this)`, and treats a successful call as proof acceptance. If the first four proof bytes match another external selector exposed by the wrapper, dispatch can invoke a successful non-verifier function instead of the generated Halo2 fallback verifier. Applications using the generated Solidity wrapper can consequently accept arbitrary app commitments and public values without checking the proof suffix, accumulator, app commitments or public values. This issue is fixed in versions 1.7.0, 2.0.0-rc.3 and 2.1.0-preview.
A vulnerability exists in the OpenVM zkVM framework's proof verification process within the OpenVmHalo2Verifier component. This issue is present in OpenVM versions prior to 1.7.0, as well as in affected 2.0 and 2.1 prereleases. The vulnerability arises because the verify function constructs proof calldata from user-controlled data and performs a static call to the contract address. If the proof data's first four bytes match a specific external selector, the call can be redirected to a non-verifier function, bypassing essential proof validation steps. As a result, applications using this verifier can incorrectly accept app commitments and public values without proper verification.
Users are advised to upgrade to OpenVM versions 1.7.0, 2.0.0-rc.3, or 2.1.0-preview, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 30, 2026CISA-ADP
Assessed Oct 30, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-754 | Improper Check for Unusual or Exceptional Conditions | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| openvm-sdk | < 1.7.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 30, 2026 | CVE Modified | CISA-ADP |
| Oct 30, 2026 | New CVE Received | [email protected] |