Description
CKEditor 5 provides a WYSIWYG editing solution. This CVE affects the following npm packages: ckeditor5-engine, ckeditor5-font, ckeditor5-image, ckeditor5-list, ckeditor5-markdown-gfm, ckeditor5-media-embed, ckeditor5-paste-from-office, and ckeditor5-widget. Following an internal audit, a regular expression denial of service (ReDoS) vulnerability has been discovered in multiple CKEditor 5 packages. The vulnerability allowed to abuse particular regular expressions, which could cause a significant performance drop resulting in a browser tab freeze. It affects all users using the CKEditor 5 packages listed above at version <= 26.0.0. The problem has been recognized and patched. The fix will be available in version 27.0.0.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ckeditor | ckeditor5 | < 27.0.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | ckeditor3 | No fix yet | — |
| Ubuntu 22.04 LTS | ckeditor3 | No fix yet | — |
| Ubuntu 20.04 LTS | ckeditor3 | No fix yet | — |
| Ubuntu 18.04 LTS | ckeditor3 | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | @ckeditor/ckeditor5-engine | < 27.0.0 | 27.0.0 | GHSA-3rh3-wfr4-76mj |
| npm | @ckeditor/ckeditor5-font | < 27.0.0 | 27.0.0 | GHSA-3rh3-wfr4-76mj |
| npm | @ckeditor/ckeditor5-image | < 27.0.0 | 27.0.0 | GHSA-3rh3-wfr4-76mj |
| npm | @ckeditor/ckeditor5-list | < 27.0.0 | 27.0.0 | GHSA-3rh3-wfr4-76mj |
| npm | @ckeditor/ckeditor5-markdown-gfm | < 27.0.0 | 27.0.0 | GHSA-3rh3-wfr4-76mj |
| npm | @ckeditor/ckeditor5-media-embed | < 27.0.0 | 27.0.0 | GHSA-3rh3-wfr4-76mj |
| npm | @ckeditor/ckeditor5-paste-from-office | < 27.0.0 | 27.0.0 | GHSA-3rh3-wfr4-76mj |
| npm | @ckeditor/ckeditor5-widget | < 27.0.0 | 27.0.0 | GHSA-3rh3-wfr4-76mj |
References
- https://www.npmjs.com/package/%40ckeditor/ckeditor5-markdown-gfm
- https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-3rh3-wfr4-76mj
- https://www.npmjs.com/package/%40ckeditor/ckeditor5-engine
- https://www.npmjs.com/package/%40ckeditor/ckeditor5-font
- https://www.npmjs.com/package/%40ckeditor/ckeditor5-image
- https://www.npmjs.com/package/%40ckeditor/ckeditor5-list
- https://www.npmjs.com/package/%40ckeditor/ckeditor5-media-embed
- https://www.npmjs.com/package/%40ckeditor/ckeditor5-paste-from-office
- https://www.npmjs.com/package/%40ckeditor/ckeditor5-widget