CVE-2026-6330 — MEDIUM (6.5)

Q: How severe is CVE-2026-6330?

CVE-2026-6330 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-6330?

Check the references section above for vendor advisories and patch information. Affected products include: Wolfssl Wolfssl.

Vulnerability Description

The ML-KEM ARM64 NEON ciphertext comparison only compares half of the input, breaking the Fujisaki-Okamoto transform's implicit rejection and weakening IND-CCA2 security on that code path. The constant-time comparison effectively ignored part of the re-encrypted ciphertext, so a decapsulating party could fail to detect a manipulated ciphertext and proceed without the standard's required implicit rejection.

CVSS Score

6.5

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Wolfssl	Wolfssl	>= 5.7.4, < 5.9.2

Related Weaknesses (CWE)

CWE-327

References

https://github.com/wolfSSL/wolfssl/pull/10192Issue TrackingPatch
https://www.wolfssl.com/docs/security-vulnerabilities/Vendor Advisory

FAQ

What is CVE-2026-6330?

CVE-2026-6330 is a vulnerability with a CVSS score of 6.5 (MEDIUM). The ML-KEM ARM64 NEON ciphertext comparison only compares half of the input, breaking the Fujisaki-Okamoto transform's implicit rejection and weakening IND-CCA2 security on that code path. The constan...

How severe is CVE-2026-6330?

CVE-2026-6330 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-6330?

Check the references section above for vendor advisories and patch information. Affected products include: Wolfssl Wolfssl.