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CVE-2026-5194

Wolfssl vulnerability

9.1 CRITICALEPSS 0.27%
  1. Published9 Apr 2026

Description

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 reduced security of ECDSA certificate-based authentication if the public CA key used is also known. This affects ECDSA/ECC verification when EdDSA or ML-DSA is also enabled.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Wolfssl≥ 3.12.0 < 5.9.1

Remediation

Fixed in
Wolfssl≥ 5.9.1

References

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Frequently asked

Is CVE-2026-5194 being actively exploited?

CVE-2026-5194 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.27%.

How severe is CVE-2026-5194?

CVE-2026-5194 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.27% probability of exploitation.

Which products are affected by CVE-2026-5194?

Affected products include Wolfssl.

How do I fix CVE-2026-5194?

Upgrade affected software to a fixed version, for example Wolfssl 5.9.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-5194 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.