CVE-2021-26271
unknown
CVSS v3
—
CVSS v4 NEW
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VIR risk
—
Description
CKEditor 4 ReDoS Vulnerability
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Fixed 2 releases
| Version | Status | Fixed in |
|---|---|---|
| bullseye | Fixed | 4.16.0+dfsg-1 |
| bookworm | Fixed | 4.16.0+dfsg-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| RubyGems | ckeditor | <>= 5.1.2 | >= 5.1.2 |
| npm | ckeditor4-dev | <4.16 | 4.16 |
References
- https://github.com/ckeditor/ckeditor4/blob/master/CHANGES.md#ckeditor-416
- https://security-tracker.debian.org/tracker/CVE-2021-26271
- https://nvd.nist.gov/vuln/detail/CVE-2021-26271
- https://github.com/ckeditor/ckeditor4
- https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416
- https://web.archive.org/web/20210128132707/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/cpujul2021.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.