certvalidator accept a certificate with version 1 and extension fields

[Jennifer-first]

I have a certificate chain [rootCA,intermediate certificate,leaf certificate], which leaf certificate has extension fields and its version is 1. Clearly, leaf certificate violate Section 4.1.2.1, RFC5280: “When extensions are used, as expected in this profile, version MUST be 3 (value is 2). ”. Meanwhile, the chain can still pass certificate verification with certvalidator0.12.0.dev1 version.

To Reproduce：

import sys
from certvalidator import CertificateValidator, ValidationContext
def main():
    if len(sys.argv) < 3:
        sys.exit(1)      
    ca_path = sys.argv[1]    
    seed_path = sys.argv[2]  
    with open(ca_path, "rb") as f:
        ca_bytes = f.read()       
    with open(seed_path, "rb") as f:
        seed_bytes = f.read()
    context = ValidationContext(
        trust_roots=[ca_bytes],
        allow_fetching=False,
        crls=[],
        ocsps=[]
    )
    validator = CertificateValidator(seed_bytes, validation_context=context)
    validator.validate_usage(key_usage=set())
    print("ok！")
if __name__ == "__main__":
    main()

python3 verify.py ca.pem seed.pem

Expected behavior：
According to RFC 5280, it should be rejected.

test.zip