CVE-2026-49216

描述

### Description The Stimulus controller shipped with `symfony/ux-autocomplete` renders AJAX response items into the dropdown by interpolating the `text` field directly into HTML template literals (`<div>${item[labelField]}</div>`) inside `_createAutocompleteWithRemoteData()`. The value is parsed as HTML rather than text, so any markup contained in the AJAX response is executed by the browser. When the dropdown values are derived from user-supplied content, an attacker can craft a string that triggers stored XSS in the browser of any other user who later opens a page containing an autocomplete widget backed by the same data. ### Resolution The `option` and `item` renderers used in `_createAutocompleteWithRemoteData()` now use TomSelect's `escape` helper to HTML-escape the value by default. Endpoints that legitimately return HTML (for example, to highlight the search term) can opt back in to the previous behavior by setting `options_as_html: true`. The `AutocompleteChoiceTypeExtension` normalizer that previously forced `options_as_html=false` when `autocomplete_url` was set has been dropped so the opt-in is reachable from the form layer. The patch for this issue is available [here](https://github.com/symfony/ux/commit/842ae54bc74de389299f975f01aafae272cb0019) for branch 2.x (and forward-ported to 3.x). ### Credits Symfony would like to thank Alex Ashkov for reporting the issue and Hugo Alliaume for providing the fix.

如何修補 CVE-2026-49216

要修補 CVE-2026-49216,請將受影響套件升級到下列已修補版本。

• —升級至 2.36.0 或更新版本

CVE-2026-49216 正在被利用嗎?

目前沒有被利用訊號。CVE-2026-49216 既不在 CISA KEV 也沒有最新的 EPSS 分數。

受影響套件(1)

• >= 2.2.0, < 2.36.0

CVSS 分數

參考連結(4)

• PATCHgithub.com/symfony/ux
• WEBgithub.com/FriendsOfPHP/security-advisories/blob/master/symfony/ux-autocomplete/CVE-2026-49216.yaml
• WEBgithub.com/symfony/ux/commit/842ae54bc74de389299f975f01aafae272cb0019
• WEBgithub.com/symfony/ux/security/advisories/GHSA-mwqm-4fw3-cjvr