CVE-2026-46669Public exploitNetwork attack vector

Pairing-check bypass via unchecked scaling factor

Published Jun 10, 2026 · Updated Jun 10, 2026

Improper input validation in OpenVM before 1.6.0 allows remote attackers to make invalid BN254 or BLS12-381 pairing checks pass. try_honest_pairing_check accepts a prover-supplied scaling factor without asserting that it belongs to the Fp6 proper subfield of Fp12, so c=1 and the inverse Miller-loop result satisfy the optimized equation. An attacker must supply a dishonest proof hint to a program using openvm-pairing; successful exploitation corrupts pairing-verification integrity without exposing data or interrupting service.

CVSS severity8.7
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in OpenVM before 1.6.0 allows remote attackers to make invalid BN254 or BLS12-381 pairing checks pass. try_honest_pairing_check accepts a prover-supplied scaling factor without asserting that it belongs to the Fp6 proper subfield of Fp12, so c=1 and the inverse Miller-loop result satisfy the optimized equation. An attacker must supply a dishonest proof hint to a program using openvm-pairing; successful exploitation corrupts pairing-verification integrity without exposing data or interrupting service.

The record

CVE
CVE-2026-46669
Published
Jun 10, 2026
Updated
Jun 10, 2026
Vendor
OpenVM
Product
OpenVM
Classifications
CWE-20
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenVM · OpenVMversion=< 1.6.0

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
8.7GitHub, Inc.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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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