CVE-2026-6450 | A CRL critical extension bypass exists in ParseCRL_Extension… | CVSS 1.0 LOW

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.

Metadata

CVE ID: CVE-2026-6450
State: PUBLISHED
Assigner: wolfSSL
Reserved: 2026-04-16 19:15 UTC
Published: 2026-06-25 20:18 UTC
Last updated: 2026-06-25 20:18 UTC
Primary CWE: CWE-295
CWE-295 Improper Certificate Validation
Vendor / Product: wolfSSL / wolfSSL
Sources: cve.org · NVD

Severity & Metrics

1.0 LOW CVSS 4.0

CVSS:4.0/AV:A/AC:H/AT:P/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Affected products (1)

Vendor	Product	Platform	Versions
wolfSSL	wolfSSL	—	4.3.0 ≤ 5.9.1

Weakness (CWE)

CWE	Source	Description
CWE-295	cna	CWE-295 Improper Certificate Validation

CVSS scores (1)

Score	Severity	Version	Source	Vector
1.0	LOW	4.0	cna	CVSS:4.0/AV:A/AC:H/AT:P/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

References (2)