What is CVE-2026-3579?

CVE-2026-3579 is a medium-severity vulnerability in Wolfssl, classified under Observable Discrepancy. CVSS score: 5.9/10. Published 2026-03-19.

How severe is CVE-2026-3579?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Wolfssl

CVE-2026-3579

wolfSSL 5.8.4 on RISC-V RV32I architectures lacks a constant-time software implementation for 64-bit multiplication. The compiler-inserted __muldi3 subroutine executes in variable time based on operand values. This affects multiple SP math functions (sp_256_mul_9, sp_256_sqr_9, etc.), leading to a timing side-channel that may expose sensitive cryptographic data.

EPSS: 0.003 (18.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Wolfssl — versions 5.8.4, 0

Weakness classification (CWE)

CWE-203 — Observable Discrepancy

References

facts@wolfssl.com (Issue Tracking)

Frequently asked questions

What is CVE-2026-3579?: CVE-2026-3579 is a medium-severity vulnerability in Wolfssl, classified under Observable Discrepancy. CVSS score: 5.9/10. Published 2026-03-19.
How severe is CVE-2026-3579?: Medium severity. CVSS v3 base score is 5.9 out of 10.