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.
References
Link | Resource |
---|---|
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/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://www.npmjs.com/package/highlight.js | Third Party Advisory |
https://www.oracle.com/security-alerts/cpujul2022.html | Third Party Advisory |
Configurations
History
No history.
Information
Published : 2020-11-24 23:15
Updated : 2024-02-28 18:08
NVD link : CVE-2020-26237
Mitre link : CVE-2020-26237
CVE.ORG link : CVE-2020-26237
JSON object : View
Products Affected
highlightjs
- highlight.js
debian
- debian_linux
oracle
- mysql_enterprise_monitor
CWE
CWE-471
Modification of Assumed-Immutable Data (MAID)