Nodejs

2 posts

Post-quantum TLS in Node.js: which versions do it and how to check

Engineering Sep 27, 2026

Post-quantum TLS in Node.js: which versions do it and how to check

Node.js 22.20+ and 24.5+ negotiate X25519MLKEM768 by default. Which versions do it, how to verify it, and the ecdhCurve setting that turns it off.

unable to verify the first certificate in Node.js: what it means and how to fix it

Engineering Sep 27, 2026

unable to verify the first certificate in Node.js: what it means and how to fix it

Node.js says unable to verify the first certificate but your browser works? What UNABLE_TO_VERIFY_LEAF_SIGNATURE means and how to fix it properly.