CVE-2026-41146 facil.io and downstream iodine ruby gem vulnerable to uncontrolled resource consumption and loop with unreachable exit condition

facil.io is a C micro-framework for web applications. Prior to commit 5128747363055201d3ecf0e29bf0a961703c9fa0, fiojsonparse can enter an infinite loop when it encounters a nested JSON value starting with i or I. The process spins in user space and pegs one CPU core at 100% instead of returning a...

CVE-2026-41146

facil.io (C micro-framework) contains a vulnerability in fio_json_parse that can enter an infinite loop when parsing a nested JSON value starting with i or I, causing a CPU core to be pegged at ~100% and not returning a parse error. The issue also affects downstream iodine Ruby gem that vendors t...

Uncontrolled resource consumption and loop with unreachable exit condition in facil.io and downstream iodine ruby gem

Summary fiojsonparse can enter an infinite loop when it encounters a nested JSON value starting with i or I. The process spins in user space and pegs one CPU core at 100% instead of returning a parse error. Because iodine vendors the same parser code, the issue also affects iodine when it parses...

GHSA-2X79-GWQ3-VXXM Uncontrolled resource consumption and loop with unreachable exit condition in facil.io and downstream iodine ruby gem

Summary fiojsonparse can enter an infinite loop when it encounters a nested JSON value starting with i or I. The process spins in user space and pegs one CPU core at 100% instead of returning a parse error. Because iodine vendors the same parser code, the issue also affects iodine when it parses...

Uncontrolled resource consumption and loop with unreachable exit condition in facil.io and downstream iodine ruby gem

Summary fiojsonparse can enter an infinite loop when it encounters a nested JSON value starting with i or I. The process spins in user space and pegs one CPU core at 100 instead of returning a parse error. Because iodine gem vendors the same parser code, the issue also affects iodine gem when it...