Botanica Software Blog

Botanica designs and builds software for problems without an established solution: research, proof of concept, and production systems, with precision and minimal overhead.

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Cryptographic Issues in Cloudflare's Circl FourQ Implementation (CVE-2025-8556)

2025166 points78 comments Security & Privacy details

The vulnerabilities we found in Cloudflare's CIRCL FourQ implementation: invalid-point attacks, Edwards-curve edge cases, and the disclosure that fixed them.