CVE-2026-62334OpenVM's OpenVmHalo2Verifier self-call can bypass proof verification
- 8.7HighCVSS base score
- 0.53%Exploitation in 30 daysEPSS · top 55% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By GitHub_M
- 4 months later
· 4 months later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 4.0 | High8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N |
| NVDNVD · Deferred | 4.0 | High8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.53% · top 55% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.7.
Affected products
- affected < 1.7.0
- affected >= 2.0.0-alpha, < 2.0.0-rc.3
- affected >= 2.1.0-dev.0, < 2.1.0-preview
References
References9
- https://github.com/openvm-org/openvm/security/advisories/GHSA-j29p-wr24-hp4f (opens in a new tab)x_refsource_CONFIRM
- https://github.com/openvm-org/openvm/pull/151 (opens in a new tab)x_refsource_MISC
- https://github.com/openvm-org/openvm/commit/751bdb1725254c3268782ddf8df89f19035666e3 (opens in a new tab)x_refsource_MISC
- https://github.com/openvm-org/openvm/blob/v2.0.0-alpha/crates/sdk/contracts/template/OpenVmHalo2Verifier.sol (opens in a new tab)x_refsource_MISC
- https://github.com/openvm-org/openvm/blob/v2.0.0-beta.2/crates/sdk/contracts/template/OpenVmHalo2Verifier.sol (opens in a new tab)x_refsource_MISC
- https://github.com/openvm-org/openvm/blob/v2.1.0-dev.0/crates/sdk/contracts/template/OpenVmHalo2Verifier.sol (opens in a new tab)x_refsource_MISC
- https://github.com/openvm-org/openvm/releases/tag/v1.7.0 (opens in a new tab)x_refsource_MISC
- https://github.com/openvm-org/openvm/releases/tag/v2.0.0-rc.3 (opens in a new tab)x_refsource_MISC
- https://github.com/openvm-org/openvm/releases/tag/v2.1.0-preview (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-114441 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-62334)Record last updated .