CVE-2021-23490
Regular Expression Denial of Service (ReDoS)
HIGH
7.5
CVSS Score
Published: December 24, 2021 at 08:05 PM UTC
Updated: June 17, 2026 at 03:38 AM UTC
1 product affected across 1 vendorParse Link Header
Using parse-link-header by N/A?
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Severity
HIGH7.5
Exploit prediction
EPSS 2%
Description
The package parse-link-header before 2.0.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the checkHeader function.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 2.0.0
Affected range stops below 2.0.0, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (3)
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/thlorenz/parse-link-header/commit/72f05c717b3f129c5331a07bf300ed8886eb8ae1x_refsource_MISCExploitPatchThird Party Advisory
Source: [email protected]
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2321973x_refsource_MISCExploitPatchThird Party Advisory
Source: [email protected]
https://snyk.io/vuln/SNYK-JS-PARSELINKHEADER-1582783CVSS
7.5HIGHsnyk
- 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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