OpenVM is a performant and modular zkVM framework built for customization and extensibility.
CVE-2026-62334
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.
Assessment
- CVSS
- 8.7 (v4.0)
- Severity
- High
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 30 October 2026
- Last updated
- 30 October 2026
- Affected
- openvm-org
- Assigner
- GitHub_M
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
At the source
References
- https://github.com/openvm-org/openvm/security/advisories/GHSA-j29p-wr24-hp4f
- https://github.com/openvm-org/openvm/pull/151
- https://github.com/openvm-org/openvm/commit/751bdb1725254c3268782ddf8df89f19035666e3
- https://github.com/openvm-org/openvm/blob/v2.0.0-alpha/crates/sdk/contracts/template/OpenVmHalo2Verifier.sol
- https://github.com/openvm-org/openvm/blob/v2.0.0-beta.2/crates/sdk/contracts/template/OpenVmHalo2Verifier.sol
- https://github.com/openvm-org/openvm/blob/v2.1.0-dev.0/crates/sdk/contracts/template/OpenVmHalo2Verifier.sol
- https://github.com/openvm-org/openvm/releases/tag/v1.7.0
- https://github.com/openvm-org/openvm/releases/tag/v2.0.0-rc.3
- https://github.com/openvm-org/openvm/releases/tag/v2.1.0-preview
Query this programmatically
Agents can read this through the MCP endpoint, or over HTTP:
curl https://cve.zerocrew.in/api/cve/CVE-2026-62334