CVE-2026-97058: Sprintf js Denial of Service Vulnerability

MODERATE
Advisory Identifier: GHSA-hp3w-g68c-fv3c
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CVSS 5.3
CWE-1284
Published
Advisory Summary

CVE-2026-97058 is a MODERATE (CVSS 5.3) denial of service vulnerability (CWE-1284: Improper Validation of Specified Quantity in Input) affecting Sprintf js libraries in the npm ecosystem. The issue involves sprintf-js vulnerable to denial of service through unbounded precision specifiers. Remediation is available in the latest vendor maintenance releases.

CVE-2026-97058 at a Glance

CVE Identifier CVE-2026-97058
GHSA Identifier GHSA-hp3w-g68c-fv3c
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-1284: Improper Validation of Specified Quantity in Input
Affected Product Sprintf js
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2026-97058

To remediate this vulnerability, upgrade all affected Sprintf js dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

sprintf-js fixed: Latest secure release 
npm install sprintf-js@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls sprintf-js

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-97058, inspect your project dependencies using npm:

npm ls sprintf-js

Analyze the terminal output to locate any version of Sprintf js in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls sprintf-js command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-1284: Improper Validation of Specified Quantity in Input, where the product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties. In Sprintf js, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-97058 Affected Sprintf js Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
sprintf-js
npm/sprintf-js
npm
≤ 1.1.3

References

NVD — CVE-2026-97058 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-97058
Sprintf js Source Repository REPOSITORY
https://github.com/alexei/sprintf.js/issues/237
Sprintf js Source Repository REPOSITORY
https://github.com/alexei/sprintf.js
Sprintf js Source Repository REPOSITORY
https://github.com/alexei/sprintf.js/blob/3a0d8c26d291b5bd9f1974877ecc50739921d6f5/src/sprintf.js#L17
Sprintf js Source Repository REPOSITORY
https://github.com/alexei/sprintf.js/blob/3a0d8c26d291b5bd9f1974877ecc50739921d6f5/src/sprintf.js#L84-L90
www.vulncheck.com/advisories/sprintf-... WEB
https://www.vulncheck.com/advisories/sprintf-js-through-1.1.3-denial-of-service-via-unbounded-precision

Frequently Asked Questions

What is CVE-2026-97058?
CVE-2026-97058 is a security vulnerability in Sprintf js involving sprintf-js vulnerable to denial of service through unbounded precision specifiers under CWE-1284: Improper Validation of Specified Quantity in Input.
Which Sprintf js versions are affected?
Affected versions include releases prior to current release patches across affected packages: sprintf-js.
What version fixes CVE-2026-97058?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is sprintf-js affected?
Yes, sprintf-js is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-97058?
CVE-2026-97058 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2026-97058?
CVE-2026-97058 is classified under CWE-1284: Improper Validation of Specified Quantity in Input (The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.).
How can I check npm dependencies for CVE-2026-97058?
Run the dependency tree command: 'npm ls sprintf-js'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-hp3w-g68c-fv3c",
  "modified" : "2026-10-05T23:47:34Z",
  "published" : "2026-09-24T15:31:31Z",
  "aliases" : [ "CVE-2026-97058" ],
  "summary" : "sprintf-js vulnerable to denial of service through unbounded precision specifiers",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "sprintf-js"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.1.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-97058"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/alexei/sprintf.js/issues/237"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/alexei/sprintf.js"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/alexei/sprintf.js/blob/3a0d8c26d291b5bd9f1974877ecc50739921d6f5/src/sprintf.js#L17"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/alexei/sprintf.js/blob/3a0d8c26d291b5bd9f1974877ecc50739921d6f5/src/sprintf.js#L84-L90"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/sprintf-js-through-1.1.3-denial-of-service-via-unbounded-precision"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1284" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-05T23:47:34Z",
    "nvd_published_at" : "2026-09-24T14:18:21Z"
  }
}