CVE-2026-46669: openvm Input Validation Flaw — Fix

Description

OpenVM is a performant and modular zkVM framework built for customization and extensibility. Prior to version 1.6.0, the openvm-pairing guest library's try_honest_pairing_check function invokes Theorem 3 of https://eprint.iacr.org/2024/640.pdf but does not check that the scaling factor s is in a proper subfield of Fp12. This allows incorrect results to the pairing check. This issue has been patched in version 1.6.0.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS — Exploit Prediction

0.0023

Probability of exploitation

0.13%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-20 Improper Input Validation

Affected Products

Vendor	Product	Versions
openvm	openvm	< 1.6.0

References

Advisories & Patches

https://github.com/openvm-org/openvm/security/advisories/GHSA-76mq-v757-53gr https://github.com/openvm-org/openvm/security/advisories/GHSA-76mq-v757-53gr

Other References

https://github.com/openvm-org/openvm/releases/tag/v1.6.0

Frequently Asked Questions

What is CVE-2026-46669? +

OpenVM is a performant and modular zkVM framework built for customization and extensibility. Prior to version 1.6.0, the openvm-pairing guest library's try_honest_pairing_check function invokes Theorem 3 of https://eprint.iacr.org/2024/640.pdf but does not check that the scaling factor s is in a proper subfield of Fp12. This allows incorrect results to the pairing check. This issue has been patched in version 1.6.0. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-46669? +

CVE-2026-46669 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0023, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-46669? +

CVE-2026-46669 affects products from openvm, specifically: openvm. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-46669? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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