How severe is CVE-2026-3230?

CVE-2026-3230 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-3230 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3230?

CVE-2026-3230 affects Wolfssl. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3230?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-3230 have an EU (EUVD) identifier?

Yes. CVE-2026-3230 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13209.

When was CVE-2026-3230 published?

CVE-2026-3230 was published on 2026-03-19 and last updated on 2026-06-17.

CVE-2026-3230

CVE-2026-3230 is a low-severity vulnerability in Wolfssl with a CVSS 3.x base score of 2.7. 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-20.

Key facts

Severity: Low (CVSS 3.x base score 2.7)
CVSS v4: 1.2
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-13209
Weakness: CWE-20
Affected product: Wolfssl
Published: 2026-03-19
Last modified: 2026-06-17

Description

Missing required cryptographic step in the TLS 1.3 client HelloRetryRequest handshake logic in wolfSSL could lead to a compromise in the confidentiality of TLS-protected communications via a crafted HelloRetryRequest followed by a ServerHello message that omits the required key_share extension, resulting in derivation of predictable traffic secrets from (EC)DHE shared secret. This issue does not affect the client's authentication of the server during TLS handshakes.

Frequently asked questions

What is CVE-2026-3230?: Missing required cryptographic step in the TLS 1.3 client HelloRetryRequest handshake logic in wolfSSL could lead to a compromise in the confidentiality of TLS-protected communications via a crafted HelloRetryRequest followed by a ServerHello message that omits the required key_share extension, resulting in derivation of predictable traffic secrets from (EC)DHE shared secret. This issue does not affect the client's authentication of the server during TLS handshakes.
How severe is CVE-2026-3230?: CVE-2026-3230 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-3230 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3230?: CVE-2026-3230 affects Wolfssl. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3230?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-3230 have an EU (EUVD) identifier?: Yes. CVE-2026-3230 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13209.
When was CVE-2026-3230 published?: CVE-2026-3230 was published on 2026-03-19 and last updated on 2026-06-17.

References

https://github.com/wolfSSL/wolfssl/pull/9754

Affected products (1)

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

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