CVE-2021-33502
HIGH
7.5
CVSS Score
Published: May 24, 2021 at 03:42 PM UTC
Updated: June 17, 2026 at 03:54 AM UTC
1 product affected across 1 vendorNormalize Url
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Severity
HIGH7.5
Exploit prediction
EPSS 2%
Description
The normalize-url package before 4.5.1, 5.x before 5.3.1, and 6.x before 6.0.1 for Node.js has a ReDoS (regular expression denial of service) issue because it has exponential performance for data: URLs.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Affected range stops below 4.5.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.3.1, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.
References (2)
x_refsource_CONFIRMRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/sindresorhus/normalize-url/releases/tag/v6.0.1x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20210706-0001/CVSS
- 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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