Vulnerability in Highlightjs Highlight.js

CVE-2020-26237

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 bas…

EPSS: 0.006 (69.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2020-26237?
CVE-2020-26237 is a medium-severity vulnerability in Highlightjs Highlight.js, classified under Modification of Assumed-Immutable Data (MAID). CVSS score: 5.8/10. Published 2020-11-24.
How severe is CVE-2020-26237?
Medium severity. CVSS v3 base score is 5.8 out of 10.
Is CVE-2020-26237 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.