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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2020-26237 Detail

Description

Highlight.js is a syntax highlighter written in JavaScript. Highlight.js versions before 9.18.2 and 10.1.2 are 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. If you allow users to insert custom HTML code blocks into your page/app via parsing Markdown code blocks (or similar) and do not filter the language names the user can provide you may be vulnerable. The pollution should just be harmless data but this can cause problems for applications not expecting these properties to exist and can result in strange behavior or application crashes, i.e. a potential DOS vector. If your website or application does not render user provided data it should be unaffected. Versions 9.18.2 and 10.1.2 and newer include fixes for this vulnerability. If you are using version 7 or 8 you are encouraged to upgrade to a newer release.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/highlightjs/highlight.js/commit/7241013ae011a585983e176ddc0489a7a52f6bb0 Patch  Third Party Advisory 
https://github.com/highlightjs/highlight.js/commit/7241013ae011a585983e176ddc0489a7a52f6bb0 Patch  Third Party Advisory 
https://github.com/highlightjs/highlight.js/pull/2636 Patch  Third Party Advisory 
https://github.com/highlightjs/highlight.js/pull/2636 Patch  Third Party Advisory 
https://github.com/highlightjs/highlight.js/security/advisories/GHSA-vfrc-7r7c-w9mx Mitigation  Third Party Advisory 
https://github.com/highlightjs/highlight.js/security/advisories/GHSA-vfrc-7r7c-w9mx Mitigation  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2020/12/msg00041.html Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2020/12/msg00041.html Mailing List  Third Party Advisory 
https://www.npmjs.com/package/highlight.js Third Party Advisory 
https://www.npmjs.com/package/highlight.js Third Party Advisory 
https://www.oracle.com/security-alerts/cpujul2022.html Third Party Advisory 
https://www.oracle.com/security-alerts/cpujul2022.html Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-471 Modification of Assumed-Immutable Data (MAID) GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

7 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-26237
NVD Published Date:
11/24/2020
NVD Last Modified:
11/21/2024
Source:
GitHub, Inc.