CVE-2026-49216

MEDIUM

Symfony UX: XSS in symfony/ux-autocomplete via unescaped AJAX response data

Title source: cna
STIX 2.1

Description

Symfony UX is a JavaScript ecosystem for Symfony. From 2.2.0 until 2.36.0 and 3.1.0, the Stimulus controller in symfony/ux-autocomplete renders AJAX response items in _createAutocompleteWithRemoteData() by interpolating the text field into HTML template literals (<div>${item[labelField]}</div>) rather than text, allowing attacker-controlled markup from user-supplied dropdown values to execute in the browser of any user who opens an autocomplete widget backed by the same data. This issue is fixed in versions 2.36.0 and 3.1.0.

References (4)

Core 4

Scores

CVSS v3 5.4
EPSS 0.0018
EPSS Percentile 7.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (4)
symfony/ux 3.0.0
symfony/ux 2.2.0 - 2.36.0
symfony/ux < 2.36.0
symfony/ux >= 3.0.0, < 3.1.0
Published Jul 17, 2026
Tracked Since Jul 17, 2026