Vulnerability DatabaseWS-2019-0266
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WS-2019-0266
Published:May 14, 2026
Updated:May 14, 2026
In Mithril, versions prior to 2.0.2 are vulnerable to prototype pollution. The function parseQueryString() may allow a malicious user to modify the prototype of Object, causing the addition or modification of an existing property that will exist on all objects.
Affected Packages
mithril (CDN_JS):
Affected version(s) >=0.1.2 <2.0.3
Fix Suggestion:
Update to version 2.0.3
mithril (NPM):
Affected version(s) >=0.1.2 <2.0.3
Fix Suggestion:
Update to version 2.0.3
mithril.js (NUGET):
Affected version(s) =0.2.0
Fix Suggestion:
Update to version no_fix
mithriljs (NUGET):
Affected version(s) =0.2.0
Fix Suggestion:
Update to version no_fix
alfs18/ramverk1-module (PHP):
Affected version(s) =dev-main <dev-master
Fix Suggestion:
Update to version dev-master
dbwebb/ramverk1 (PHP):
Affected version(s) =dev-master <v1.0.1
Fix Suggestion:
Update to version v1.0.1
Related Resources (2)
https://github.com/MithrilJS/mithril.js/commit/97fa1788c2184ff4b87fd3f558b7003f9eeee2b1
https://github.com/MithrilJS/mithril.js/pull/2494
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CVSS v4
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
HIGH