What is the CVSS score of CVE-2020-26237?

CVE-2020-26237 has a CVSS 3.1 base score of 8.7 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:H. EPSS exploitation probability: 1.3%.

Is there a patch available for CVE-2020-26237?

Yes, a patch is available for CVE-2020-26237. Update the affected software to the latest version immediately.

Highlight Js CVE-2020-26237

HIGH

Modification of Assumed-Immutable Data (MAID) (CWE-471)

2020-11-24 security-advisories@github.com

Denial Of Service Highlight Js Debian Linux Mysql Enterprise Monitor

8.7

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.7 HIGH

AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

None

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Nov 24, 2020 - 23:15 nvd

HIGH 8.7

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

4 npm packages depend on highlight.js (2 direct, 2 indirect)

Ecosystem-wide dependent count for version 10.0.0.

DescriptionNVD

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.

AnalysisAI

Highlight.js is a syntax highlighter written in JavaScript. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, low attack complexity.

Technical ContextAI

This vulnerability is classified under CWE-471. 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. Affected products include: Highlightjs Highlight.Js, Debian Debian Linux, Oracle Mysql Enterprise Monitor. Version information: before 9.18.2.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.