CVE-2026-85730: Squirrelchat Smol-Toml

High severity, CVSS 8.2. EPSS: 0.5% chance of exploitation in the next 30 days.

smol-toml is a small, fast, and correct TOML parser and serializer. Prior to 1.7.1, parse() can enter an infinite loop when a value inside an array or inline table is followed by a comment with no trailing newline. In src/util.ts, skipUntil() calls indexOfNewline(), receives -1 at the end of input, and resets the cursor to the beginning of the string instead of leaving the structure scan. The parser then hangs indefinitely and can consume a service's processing capacity when an application parses attacker-controlled TOML. This issue is fixed in version 1.7.1.

Affected products

• Squirrelchat Smol-Toml: before 1.7.1 (fixed in 1.7.1)

Published 2026-09-04. Last modified 2026-09-09.