{"action":"Upgrade ckeditor4-dev to 4.16 or later.","affected":[{"fixed":"4.16","introduced":"0"}],"component":"ckeditor4-dev","cve_ids":["CVE-2021-26271"],"ecosystem":"npm","epss":0.01994,"exploited":false,"fixed_versions":["4.16"],"ghsa_id":"GHSA-jv4c-7jqq-m34x","id":"tcs_01M5KFYXRG343FBP30M8V5P2CE","modified_at":"2026-09-10T03:49:39.067777385Z","published_at":"2022-05-24T17:40:21Z","references":["https://osv.dev/vulnerability/GHSA-jv4c-7jqq-m34x","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"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"GHSA-jv4c-7jqq-m34x","url":"https://osv.dev/vulnerability/GHSA-jv4c-7jqq-m34x"}],"summary":"CKEditor 4 ReDoS Vulnerability"}