CVE-2020-26237: Prototype Pollution in highlight.js
First published: Mon Nov 23 2020(Updated: )
A flaw was found in nodejs-highlight-js. Highlight.js is vulnerable to Prototype Pollution. A malicious HTML code block can be crafted that will result in prototype pollution of the base object's prototype during highlighting.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/highlight.js | <9.18.2 | 9.18.2 |
| redhat/highlight.js | <10.1.2 | 10.1.2 |
| Highlight.js | <9.18.2 | |
| Highlight.js | >=10.1.0<10.1.2 | |
| Debian Linux | =9.0 | |
| MySQL Enterprise Monitor | <=8.0.30 |
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Reference Links
- https://github.com/highlightjs/highlight.js/commit/7241013ae011a585983e176ddc0489a7a52f6bb0
- https://github.com/highlightjs/highlight.js/pull/2636
- https://github.com/highlightjs/highlight.js/security/advisories/GHSA-vfrc-7r7c-w9mx
- https://lists.debian.org/debian-lts-announce/2020/12/msg00041.html
- https://www.npmjs.com/package/highlight.js
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1901664
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1901663
- https://access.redhat.com/errata/RHSA-2021:3917
- https://access.redhat.com/security/cve/cve-2020-26237
- https://bugzilla.redhat.com/show_bug.cgi?id=1901662
- https://www.cve.org/CVERecord?id=CVE-2020-26237 https://nvd.nist.gov/vuln/detail/CVE-2020-26237 https://github.com/highlightjs/highlight.js/security/advisories/GHSA-vfrc-7r7c-w9mx
Frequently Asked Questions
What is the severity of CVE-2020-26237?
CVE-2020-26237 is classified as a moderate severity vulnerability due to its potential for prototype pollution.
How do I fix CVE-2020-26237?
To mitigate CVE-2020-26237, update to highlight.js version 9.18.2 or 10.1.2.
What software is affected by CVE-2020-26237?
CVE-2020-26237 affects highlight.js versions prior to 9.18.2 and versions between 10.1.0 and 10.1.2.
What type of vulnerability is CVE-2020-26237?
CVE-2020-26237 is a prototype pollution vulnerability that can be exploited through crafted HTML code.
Can CVE-2020-26237 impact my applications?
Yes, if your application directly uses vulnerable versions of highlight.js, it may be susceptible to attacks leveraging this vulnerability.
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