darkhttpd through 1.15 allows local users to discover credentials (for --auth) by listing processes and their arguments.
https://github.com/emikulic/darkhttpd/compare/v1.14...v1.15
https://github.com/emikulic/darkhttpd/commit/2b339828b2a42a5fda105ea84934957a7d23e35d