CVE-2026-62333: openvm · Improper Input Validation
Affects openvmSource CVE Database V5
Not known to be exploited · CVSS 8.7 High · fixed in 2.1.0-preview : patch openvm soon.
Data as of 30 Oct 2026, 20:18 UTC
Thin evidence
One scorer or none| CNA (GitHub_M) | CVSS 4.0 | 8.7 |
|---|
- Patch
- Available – fixed in 2.1.0-preview, 2.0.0-rc.3, 1.7.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 30 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade openvm to 2.1.0-preview, 2.0.0-rc.3 or 1.7.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| openvm-orgopenvm | Affected
| Fixed in
|
| openvm-orgopenvm | Affected
| Fixed in
|
| openvm-orgopenvm | Affected
| Fixed in
|
AI-suggested
Upgrade OpenVM to version 1.7.0 or later in the 1.x line, or to 2.0.0-rc.3 or later in the 2.0 line, or to 2.1.0-preview or later in the 2.1 line. These versions contain the fix that properly forbids Merkle expansion rows at parent_height = 0 or below when expand_direction != 0, preventing the described memory root manipulation. No other mitigation is indicated.
Description
CVE-2026-62333 is a high-severity vulnerability in the openvm-org OpenVM zkVM framework affecting versions prior to 1.7.0 in the 1.x line and certain prereleases of 2.0 and 2.1. The flaw involves improper input validation in the MemoryMerkleAir component, allowing a malicious prover to fabricate a subtree below a memory leaf and alter the committed memory root without corresponding memory operations. This compromises the soundness of OpenVM proofs using persistent memory. The issue is fixed in OpenVM versions 1.7.0, 2.0.0-rc.3, and 2.1.0-preview.
References
- github.com/openvm-org/openvm/security/advisories/GHSA-396x-v8w4-9x82 (opens in a new tab)
- github.com/openvm-org/openvm/pull/148 (opens in a new tab)
- github.com/openvm-org/openvm/commit/bb123f6073691bd2b794171c594264c77e45c376 (opens in a new tab)
- github.com/openvm-org/openvm/blob/v2.0.0-alpha/crates/vm/src/system/memory/merkle/air.rs (opens in a new tab)
- github.com/openvm-org/openvm/blob/v2.0.0-beta.2/crates/vm/src/system/memory/merkle/air.rs (opens in a new tab)
- github.com/openvm-org/openvm/blob/v2.1.0-dev.0/crates/vm/src/system/memory/merkle/air.rs (opens in a new tab)
- github.com/openvm-org/openvm/releases/tag/v1.7.0 (opens in a new tab)
- github.com/openvm-org/openvm/releases/tag/v2.0.0-rc.3 (opens in a new tab)
- github.com/openvm-org/openvm/releases/tag/v2.1.0-preview (opens in a new tab)