CVE-2026-5194
CriticalSummary
Missing hash/digest size and OID checks allow digests smaller than allowed when verifying ECDSA certificates to be accepted. This could lead to reduced security of ECDSA certificate-based authentication if the public CA key used is also known.
Risk Assessment
The organization may be exposed to certificate fraud attacks, potentially leading to unauthorized access to systems. Reduced authentication security could impact data integrity and trust in systems.
Recommendation
It is recommended to implement additional checks for hash size and OID in signature verification functions. Also, monitor and update the public CA keys in use.
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Original NVD description (English source)
Missing hash/digest size and OID checks allow digests smaller than allowed when verifying ECDSA certificates, or smaller than is appropriate for the relevant key type, to be accepted by signature verification functions. This could lead to reduced security of ECDSA certificate-based authentication if the public CA key used is also known. This affects ECDSA/ECC verification when EdDSA or ML-DSA is also enabled.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS