CVE-2026-48760

MEDIUM6.1

Symfony: HtmlSanitizer URL Parser Deny Gates Underinclusive: Percent-Encoded BiDi Marks and Unicode Whitespace Bypass Visual-Spoofing Defense

Published Jul 14, 2026

Modified 2 weeks ago

Details

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 6.1.0 until 6.4.41, 7.4.13, and 8.0.13, UrlSanitizer::parse() rejected raw BiDi formatting characters but not percent-encoded forms and used an ASCII-only whitespace check, allowing sanitized URLs to retain visual-spoofing characters that downstream consumers could decode or display. This issue is fixed in versions 6.4.41, 7.4.13, and 8.0.13.

References

WEB

https://github.com/symfony/symfony/commit/b21a626fd90f5c12d2db432c629eed3e780ba2f8

WEB

https://github.com/symfony/symfony/releases/tag/v6.4.41

WEB

https://github.com/symfony/symfony/releases/tag/v7.4.13

WEB

https://github.com/symfony/symfony/releases/tag/v8.0.13

WEB

https://github.com/symfony/symfony/security/advisories/GHSA-v3wm-qf9p-c549

ADVISORY