Vulnerability Details CVE-2020-26302
is.js is a general-purpose check library. Versions 0.9.0 and prior contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). is.js uses a regex copy-pasted from a gist to validate URLs. Trying to validate a malicious string can cause the regex to loop “forever." This vulnerability was found using a CodeQL query which identifies inefficient regular expressions. is.js has no patch for this issue.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 36.4%
CVSS Severity
CVSS v3 Score 7.5
References
Products affected by CVE-2020-26302
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cpe:2.3:a:is.js_project:is.js:0.2.0
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cpe:2.3:a:is.js_project:is.js:0.2.1
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cpe:2.3:a:is.js_project:is.js:0.2.2
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cpe:2.3:a:is.js_project:is.js:0.2.3
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cpe:2.3:a:is.js_project:is.js:0.3.0
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cpe:2.3:a:is.js_project:is.js:0.3.1
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cpe:2.3:a:is.js_project:is.js:0.4.0
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cpe:2.3:a:is.js_project:is.js:0.4.1
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cpe:2.3:a:is.js_project:is.js:0.5.0
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cpe:2.3:a:is.js_project:is.js:0.5.1
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cpe:2.3:a:is.js_project:is.js:0.5.2
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cpe:2.3:a:is.js_project:is.js:0.6.0
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cpe:2.3:a:is.js_project:is.js:0.7.0
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cpe:2.3:a:is.js_project:is.js:0.7.1
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cpe:2.3:a:is.js_project:is.js:0.7.2
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cpe:2.3:a:is.js_project:is.js:0.7.3
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cpe:2.3:a:is.js_project:is.js:0.7.4
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cpe:2.3:a:is.js_project:is.js:0.7.5
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cpe:2.3:a:is.js_project:is.js:0.7.6
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cpe:2.3:a:is.js_project:is.js:0.8.0
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cpe:2.3:a:is.js_project:is.js:0.9.0