CVE-2026-62335OpenVM's OpenVmHalo2Verifier accepts non-canonical app commitments
- 6.9MediumCVSS base score
- 0.38%Exploitation in 30 daysEPSS · top 68% 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` accepts `appExeCommit` and `appVmCommit` as `bytes32` values without checking that either is less than the `BN254` scalar field modulus. Although public-value and proof-data lengths are checked, callers can provide non-canonical 256-bit encodings greater than or equal to that modulus at the Solidity wrapper boundary. Applications relying on the wrapper can therefore accept non-canonical app executable and app VM commitments, creating ambiguity between the supplied byte-level values and the field elements used by the verifier. 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
- 7 days later
· 7 days later
Record updated
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 | Medium6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
| NVDNVD · Deferred | 4.0 | Medium6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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)
- 0.38% · top 68% 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: Medium 6.9.
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-w82q-w67c-67wv (opens in a new tab)x_refsource_CONFIRM
- https://github.com/openvm-org/openvm/pull/152 (opens in a new tab)x_refsource_MISC
- https://github.com/openvm-org/openvm/commit/1962276254aabc5420de266a8cb672433ce955ff (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-2026-114438 (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-2026-62335)Record last updated .