CVE - CVE-2020-26237

CVE-ID
CVE-2020-26237	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://github.com/highlightjs/highlight.js/security/advisories/GHSA-vfrc-7r7c-w9mx URL:https://github.com/highlightjs/highlight.js/security/advisories/GHSA-vfrc-7r7c-w9mx MISC:https://github.com/highlightjs/highlight.js/commit/7241013ae011a585983e176ddc0489a7a52f6bb0 URL:https://github.com/highlightjs/highlight.js/commit/7241013ae011a585983e176ddc0489a7a52f6bb0 MISC:https://github.com/highlightjs/highlight.js/pull/2636 URL:https://github.com/highlightjs/highlight.js/pull/2636 MISC:https://www.npmjs.com/package/highlight.js URL:https://www.npmjs.com/package/highlight.js MISC:https://www.oracle.com/security-alerts/cpujul2022.html URL:https://www.oracle.com/security-alerts/cpujul2022.html MLIST:[debian-lts-announce] 20201230 [SECURITY] [DLA 2511-1] highlight.js security update URL:https://lists.debian.org/debian-lts-announce/2020/12/msg00041.html
Assigning CNA
GitHub (maintainer security advisories)
Date Record Created
20201001	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20201001)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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