What is CVE-2026-6094?

CVE-2026-6094 is a critical-severity vulnerability in Wolfssl, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2026-06-25.

How severe is CVE-2026-6094?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Out-of-bounds Read in Wolfssl

CVE-2026-6094

Heap buffer overread in wc_PKCS7_DecodeEnvelopedData when parsing crafted PKCS7 EnvelopedData. This could theoretically be triggered by attacker-supplied data delivered via S/MIME or CMS.

Vulnerability class: Buffer Overflow

Published 2026-06-25 · last modified 2026-06-26.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (41.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Wolfssl — versions 5.8.0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

github.com/wolfSSL/wolfssl/pull/10128 (Patch, patch, Issue Tracking)
www.wolfssl.com/docs/security-vulnerabilities/ (Vendor Advisory)

Frequently asked questions

What is CVE-2026-6094?: CVE-2026-6094 is a critical-severity vulnerability in Wolfssl, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2026-06-25.
How severe is CVE-2026-6094?: Critical severity. CVSS v3 base score is 9.1 out of 10.