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
- Highlightjs Highlight.js — versions < 9.18.2, >= 10.0.0, < 10.1.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/highlightjs/highlight.js/security/advisories/GHSA-vfrc-7r7c-w9mx (x_refsource_CONFIRM)
- github.com/highlightjs/highlight.js/pull/2636 (x_refsource_MISC)
- www.npmjs.com/package/highlight.js (x_refsource_MISC)
- github.com/highlightjs/highlight.js/commit/7241013ae011a585983e176ddc0489a7a52f… (x_refsource_MISC)
- [debian-lts-announce] 20201230 [SECURITY] [DLA 2511-1] highlight.js security update (mailing-list, x_refsource_MLIST)
- www.oracle.com/security-alerts/cpujul2022.html (x_refsource_MISC)
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.