CVE-2021-23354
Regular Expression Denial of Service (ReDoS)
HIGH
7.5
CVSS Score
Published: March 12, 2021 at 03:10 PM UTC
Updated: June 17, 2026 at 03:38 AM UTC
1 product affected across 1 vendorPrintf
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Severity
HIGH7.5
Exploit prediction
EPSS 2%
Description
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.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (3)
x_refsource_MISCExploitIssue TrackingThird Party Advisory
Source: [email protected]
https://github.com/adaltas/node-printf/issues/31x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/adaltas/node-printf/pull/32CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-1333
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