CVE-2026-57531 - Milkdown < 7.21.3 DOM XSS via innerHTML Assignment

CVE-2026-57531 - Milkdown < 7.21.3 DOM XSS via innerHTML Assignment

https://cvefeed.io/rssfeed/latest.atom / Sat, 07/25/2026 - 01:07
CVE ID :CVE-2026-57531
Published : July 24, 2026, 8:18 p.m. | 2 hours, 33 minutes ago
Description :Milkdown before 7.21.3 contains a DOM cross-site scripting vulnerability in the @milkdown/plugin-emoji package that allows unauthenticated attackers to execute arbitrary JavaScript in the host application's origin by causing a victim to paste attacker-controlled content. The parseDOM.getAttrs handler stores raw innerHTML of pasted span elements with data-type="emoji" without sanitization, and the toMarkdown runner subsequently assigns this unsanitized value directly to a live DOM element's innerHTML, bypassing the DOMPurify sanitization used in the toDOM path, causing payload execution on every markdown serialization cycle.
Severity: 5.4 | MEDIUM
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