# CVE-2026-10097

## Summary

- **CVE ID:** CVE-2026-10097
- **Severity:** HIGH
- **CVSS Score:** 8.3 (CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-327, CWE-697
- **Published:** Jun 25, 2026
- **Last Modified:** Jun 26, 2026

## Description

ML-KEM-1024 x64 AVX2 implicit rejection failure in the Fujisaki-Okamoto transform breaks IND-CCA2 security, allowing decapsulation to deviate from the implicit-rejection behavior required by the standard. The AVX2 constant-time ciphertext comparison used during decapsulation never compared the final 32-byte block of the 1568-byte ML-KEM-1024 ciphertext, so a ciphertext manipulated only in those final bytes would compare as equal and decapsulation returned the real shared secret instead of performing the required implicit rejection.

## Affected Products

- wolfSSL — wolfSSL (5.7.0)

## References

- [CNA](https://github.com/wolfSSL/wolfssl/pull/10430)
- [CNA](https://www.wolfssl.com/docs/security-vulnerabilities/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.26%
- **EPSS Percentile:** 17.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._