CVSS 4.0
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, без вход и след действие от потребителя.
- Експлоатация: има публичен пример за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
Improper Neutralization of Input During Web Page Generation (XSS) vulnerability in leandrocp mdex allows cross-site scripting via unsanitized URL schemes in Quill Delta output. 'Elixir.MDEx':to_delta/2 converts Markdown into a Quill Delta. 'Elixir.MDEx.DeltaConverter':default_convert_node/3 in lib/mdex/delta_converter.ex copies the URL of a link, wikilink, or image node directly from the parsed Markdown into the Delta "link" or "image" attribute without applying a scheme allowlist or any normalization. An attacker who controls the Markdown text can supply a javascript: URL (for example [click](javascript:alert(document.cookie))) that survives verbatim into the Delta attribute. When the Delta is rendered to HTML by a downstream renderer (such as quill-delta-to-html or the Quill client), the attribute becomes an <a href> or <img src>, and the javascript: scheme executes in the browser of anyone who views the rendered content. The link and wikilink cases are the strongest vectors because javascript: in an href executes on click; the image case is lower impact because javascript: in <img src> generally does not execute in modern browsers. This issue affects mdex: from 0.8.3 before 0.13.2.
Засегнати продукти
- leandrocp mdex: 0.8.3 преди 0.13.2
- leandrocp mdex: 9852db2456fdc9d856eb636603a7f608e22e3793 преди 2817147f5b87ce7186aa604c9ee72499485b8f2f
Вид слабост
История
- 29 юни 2026 Публикувано
Други уязвимости в leandrocp mdex
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-54889
- https://nvd.nist.gov/vuln/detail/CVE-2026-54889
- https://github.com/leandrocp/mdex/security/advisories/GHSA-4383-7xfp-gpph
- https://cna.erlef.org/cves/CVE-2026-54889.html
- https://osv.dev/vulnerability/EEF-CVE-2026-54889
- https://github.com/leandrocp/mdex/commit/2817147f5b87ce7186aa604c9ee72499485b8f2f