Critical severity9.1NVD Advisory· Published Apr 9, 2026· Updated May 23, 2026
CVE-2026-5194
CVE-2026-5194
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2Patches
Vulnerability mechanics
References
2News mentions
3- Anthropic to release Mythos-class models to the publicThe Register Security · May 25, 2026
- Claude Mythos AI Finds 10,000 High-Severity Flaws in Widely Used SoftwareThe Hacker News · May 23, 2026
- Anthropic’s Claude Mythos Preview Uncovers 10,000+ 0-Days in Project GlasswingCyber Security News · May 23, 2026