CVE-2026-97058: Alexei Sprintf-Js

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

sprintf-js through 1.1.3 passes unbounded precision specifiers to toFixed, toExponential, and toPrecision methods without validation, causing uncaught RangeError exceptions. Attackers who control format strings can inject precision values exceeding ECMAScript limits to abort calling operations with minimal payload.

Affected products

• Alexei Sprintf-Js: up to and including 1.1.3

Published 2026-09-24. Last modified 2026-09-24.