Vulnerability DatabaseWS-2019-0069
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WS-2019-0069
Published:May 14, 2026
Updated:May 14, 2026
Versions of preact 10.x on prerelease tags alpha and beta prior to 10.0.0-beta.1 are vulnerable to HTML Injection. Due to insufficient input validation the package allows attackers to inject JavaScript objects as virtual-dom nodes, which may lead to Cross-Site Scripting.
Affected Packages
preact (CDN_JS):
Affected version(s) >=10.0.0-alpha.0 <10.0.0
Fix Suggestion:
Update to version 10.0.0
preact (NPM):
Affected version(s) >=10.0.0-alpha.0 <10.0.0
Fix Suggestion:
Update to version 10.0.0
Related Resources (2)
https://github.com/developit/preact/commit/7a631132535f5c1b5505bb49430bdf144945d3e5
https://www.npmjs.com/advisories/835
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CVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE