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TI-2021-06050 Aliases CVE-2021-23354GHSA-xfhp-gmh8-r8v2

Regular expression denial of service (ReDoS) in printf

Priority LOW 37CWE-1333Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-1333.

Summary

The package printf before 0.6.1 are vulnerable to Regular Expression Denial of Service (ReDoS) via the regex string /\%(?:\(([\w_.]+)\)|([1-9]\d*)\$)?([0 +\-\]*)(\*|\d+)?(\.)?(\*|\d+)?[hlL]?([\%bscdeEfFgGioOuxX])/g in lib/printf.js. The vulnerable regular expression has cubic worst-case time complexity.

Why it matters now

EPSS 0.02176 82nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed printf: 0.6.1printf (npm): 0.6.1

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—printfbefore 0.6.10.6.1Patch availableCNA
—printf (npm)before 0.6.10.6.1Patch availableGHSA-xfhp-gmh8-r8v2
  • printf Vendor— Affected before 0.6.1 Fixed in 0.6.1 Patch available CNA
  • printf (npm) Vendor— Affected before 0.6.1 Fixed in 0.6.1 Patch available GHSA-xfhp-gmh8-r8v2

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:adaltas:printf:*:*:*:*:*:node.js:*:*before 0.6.1Vulnerableadaltas
  • cpe:2.3:a:adaltas:printf:*:*:*:*:*:node.js:*:* Versions before 0.6.1 Vulnerable ·adaltas

Remediation

  • Fix · CNA printf Fixed in 0.6.1
  • Fix · GHSA-xfhp-gmh8-r8v2 printf (npm) Fixed in 0.6.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-23354
  2. 2026-10-03 Alias added: GHSA-xfhp-gmh8-r8v2

References

Exploit 1

Patch 1

Advisory 1

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences