AIKIDO-2026-380946
spomky-labs/pki-framework is vulnerable to Improper Verification of Cryptographic Signature
53
Medium Risk
This Affects:
spomky-labs/pki-frameworkTL;DR
OpenSSLCrypto::verify() verifies ECDSA signatures against a canonical re-encoding of the parsed r and s values rather than the received bytes, and ECSignature decodes those values with permissive BER. Many distinct byte encodings of one signature pass verification. Controls that pin, deny list, deduplicate, revoke, or log certificates by fingerprint can be bypassed because a mutated encoding validates while its digest differs, and the library accepts encodings that OpenSSL rejects. The fix verifies the originally received signature bytes.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you rely on ECDSA certificate fingerprints for pinning, deny listing, deduplication, or revocation.
Background info
spomky-labs/pki-framework is vulnerable to Improper Verification of Cryptographic Signature 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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SOC 2Compliant
ISO 27001CompliantISO 42001Compliant
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