How severe is CVE-2026-6450?

CVE-2026-6450 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-6450 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-6450?

CVE-2026-6450 affects Wolfssl. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-6450?

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

Does CVE-2026-6450 have an EU (EUVD) identifier?

Yes. CVE-2026-6450 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39559.

When was CVE-2026-6450 published?

CVE-2026-6450 was published on 2026-06-25 and last updated on 2026-06-27.

CVE-2026-6450

CVE-2026-6450 is a medium-severity vulnerability in Wolfssl with a CVSS 3.x base score of 5.3. 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: Medium (CVSS 3.x base score 5.3)
CVSS v4: 1.0
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39559
Weakness: CWE-295
Affected product: Wolfssl
Published: 2026-06-25
Last modified: 2026-06-27

Description

A CRL critical extension bypass exists in ParseCRL_Extensions where critical extensions are not properly enforced, allowing a crafted CRL with an unhandled critical extension to be accepted. This only affects builds with CRL support enabled and where a crafted CRL had a trusted signature when parsed.

Frequently asked questions

What is CVE-2026-6450?: A CRL critical extension bypass exists in ParseCRL_Extensions where critical extensions are not properly enforced, allowing a crafted CRL with an unhandled critical extension to be accepted. This only affects builds with CRL support enabled and where a crafted CRL had a trusted signature when parsed.
How severe is CVE-2026-6450?: CVE-2026-6450 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-6450 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-6450?: CVE-2026-6450 affects Wolfssl. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-6450?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-6450 have an EU (EUVD) identifier?: Yes. CVE-2026-6450 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39559.
When was CVE-2026-6450 published?: CVE-2026-6450 was published on 2026-06-25 and last updated on 2026-06-27.

References

Affected products (1)

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

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