sprintf-js vulnerable to denial of service through unbounded precision specifiers
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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | sprintf-js | <= 1.1.3 | no fix |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-97058
- https://github.com/alexei/sprintf.js/issues/237
- https://github.com/alexei/sprintf.js
- https://github.com/alexei/sprintf.js/blob/3a0d8c26d291b5bd9f1974877ecc50739921d6f5/src/sprintf.js#L17
- https://github.com/alexei/sprintf.js/blob/3a0d8c26d291b5bd9f1974877ecc50739921d6f5/src/sprintf.js#L84-L90
- https://www.vulncheck.com/advisories/sprintf-js-through-1.1.3-denial-of-service-via-unbounded-precision
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L- Weakness (CWE)
CWE-1284- Platform
- npm
- Package
sprintf-js- Disclosed
- 24.09.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-hp3w-g68c-fv3c - CC BY 4.0
Vulnerability history: sprintf-js
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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