Vulnerability in Wolfssl

CVE-2026-5194

Missing hash/digest size and OID checks allow digests smaller than allowed when verifying ECDSA certificates, or smaller than is appropriate for the relevant key type, to be accepted by signature verification functions. This could lead to…

Vulnerability class: Improper Certificate Validation

EPSS: 0.000 (5.5th percentile) — read the EPSS interpretation.

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:H/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2026-5194?
CVE-2026-5194 is a critical-severity vulnerability in Wolfssl, classified under Improper Certificate Validation. CVSS score: 9.1/10. Published 2026-04-09.
How severe is CVE-2026-5194?
Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2026-5194 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.