njs through 0.3.1, used in NGINX, has a segmentation fault in String.prototype.toBytes for negative arguments, related to nxtutf8next in nxt/nxtutf8.h and njsstringoffset in njs/njsstring.c.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-11837.json"