AIKIDO-2026-383869
spomky-labs/pki-framework is vulnerable to Improper Certificate Validation
59
Medium Risk
This Affects:
spomky-labs/pki-frameworkTL;DR
ACValidator::validate() does not reject an attribute certificate with an unsupported critical extension, contrary to RFC 5755 section 5 check 7. Restriction bearing extensions such as basicAttConstraints, timeSpecification, acceptablePrivilegePolicies and holderNameConstraints are ignored, so issuer limits are discarded and attributes are granted unconditionally. The same criticality check already existed for public key certificates but was never applied to attribute certificates. The fix rejects unsupported critical extensions on attribute certificates.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you validate attribute certificates.
Background info
spomky-labs/pki-framework is vulnerable to Improper Certificate Validation in versions 0.0.1 - 1.6.1.
How to fix this
Upgrade the spomky-labs/pki-framework library to the patch version.
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