CVE-2019-13617: F5 Njs

Medium severity, CVSS 6.5. EPSS: 1.3% chance of exploitation in the next 30 days.

njs through 0.3.3, used in NGINX, has a heap-based buffer over-read in nxt_vsprintf in nxt/nxt_sprintf.c during error handling, as demonstrated by an njs_regexp_literal call that leads to an njs_parser_lexer_error call and then an njs_parser_scope_error call.

Affected products

• F5 Njs: up to and including 0.3.3

Published 2019-07-16. Last modified 2026-06-17.