How severe is CVE-2026-5194?

CVE-2026-5194 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-5194 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5194?

CVE-2026-5194 affects Wolfssl. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-5194?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-5194 have an EU (EUVD) identifier?

Yes. CVE-2026-5194 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21070.

When was CVE-2026-5194 published?

CVE-2026-5194 was published on 2026-04-09 and last updated on 2026-06-17.

CVE-2026-5194

CVE-2026-5194 is a critical-severity vulnerability in Wolfssl with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v4: 9.3
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21070
Weakness: CWE-295
Affected product: Wolfssl
Published: 2026-04-09
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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 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.
How severe is CVE-2026-5194?: CVE-2026-5194 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-5194 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5194?: CVE-2026-5194 affects Wolfssl. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-5194?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-5194 have an EU (EUVD) identifier?: Yes. CVE-2026-5194 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21070.
When was CVE-2026-5194 published?: CVE-2026-5194 was published on 2026-04-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*

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