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CVE-2026-97058— sprintf-js through 1.1.3 Denial of Service via Unbounded Precision

Quick assessment

Affected
alexei sprintf-js
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 sprintf-js 1.1.3 及更早版本中，程序会将未限制精度的格式说明符直接传递给 、 和 方法，且未进行任何验证，从而导致未捕获的 RangeError 异常。攻击者若能控制格式字符串，便可注入超过 ECMAScript 规范限制的精度的值，以极小的负载即可导致调用操作中止。

CVSS 5.3 · Medium EPSS 0.37% · P28

Affected Version Matrix 1

VendorProduct Version RangeStatus
alexei sprintf-js ≤ 1.1.3 affected
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I. Basic Information for CVE-2026-97058

Vulnerability Information
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Vulnerability Title
sprintf-js through 1.1.3 Denial of Service via Unbounded Precision
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1284
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
alexei sprintf-js 0 ~ 1.1.3 -

II. Public POCs for CVE-2026-97058

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III. Intelligence Information for CVE-2026-97058

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Patches & Fixes for CVE-2026-97058 (1)

Vendor Advisories for CVE-2026-97058 (1)

Security Blog Posts for CVE-2026-97058 (1)

Other References for CVE-2026-97058 (2)

IV. Related Vulnerabilities

Same weakness: CWE-1284

V. Comments for CVE-2026-97058

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