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VulnerabilityPublished

CVE-2026-62333: openvm · Improper Input Validation

Affects openvmSource CVE Database V5

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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

CVSS 4.0 base score
8.7High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (GitHub_M)CVSS 4.08.7
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
openvm-orgopenvmAffected
  • >=2.1.0-dev.0 <2.1.0-preview
Fixed in
  • 2.1.0-preview
openvm-orgopenvmAffected
  • >=2.0.0-alpha <2.0.0-rc.3
Fixed in
  • 2.0.0-rc.3
openvm-orgopenvmAffected
  • <1.7.0
Fixed in
  • 1.7.0

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

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