---
cve: "CVE-2021-26272"
severity: "LOW"
cvss: 3.1
epss: "2.2%"
vendor: "n/a"
kev: false
exploited: false
published: "2021-01-26 21:15:12"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T10:07:19+02:00"
---

# CVE-2021-26272

> 3.1 LOW · 🧪 PoC

## Beschreibung

It was possible to execute a ReDoS-type attack inside CKEditor 4 before 4.16 by persuading a victim to paste crafted URL-like text into the editor, and then press Enter or Space (in the Autolink plugin).

## Patch verfügbar (OSV)

- 17a1555f7fbb0e83f737c9efe27650dca8dff36f (Commit)
- a393696ad5523e9f5ffab76e9b653240c49c770b (Commit)

## Referenzen

- <https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416>
- <https://www.oracle.com//security-alerts/cpujul2021.html>
- <https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first>
- <https://www.oracle.com/security-alerts/cpuoct2021.html>
- <https://www.oracle.com/security-alerts/cpujan2022.html>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-26272) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_