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OpenAdvisories
Low · 2.3 CVE-2026-45065 EUVD-2026-44323GHSA-72xp-p242-47p9

Symfony: UrlGenerator Route-Requirement Bypass via Unanchored Regex Alternation → Off-Site //host URL Injection

Published Jul 14, 2026 · Updated Jul 14, 2026 · Assigned by GitHub_M

Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, UrlGenerator validates route parameters against a pattern built as ^ plus the raw requirement plus $; with ungrouped alternations, middle alternatives match as unanchored substrings, allowing a value such as //evil.com to satisfy a common locale requirement and generate a protocol-relative off-site URL. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.

Affected products

VendorProductAffectedFixed
symfony symfony < 5.4.52, >= 6.0.0-BETA1, < 6.4.40, >= 7.0.0-BETA1, < 7.4.12, >= 8.0.0-BETA1, < 8.0.12 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 symfony 7.4.12+dfsg-1 —
Debian 13 symfony 6.4.41+dfsg-0+deb13u1 —
Debian 12 symfony 5.4.53+dfsg-0+deb12u1 —
ReleasePackageFixed inAdvisory
Ubuntu 26.10 symfony No fix yet —
Ubuntu 26.04 LTS symfony No fix yet —
Ubuntu 25.10 symfony No fix yet —
Ubuntu 16.04 LTS symfony No fix yet —
Show 4 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 24.04 LTS symfony No fix yet —
Ubuntu Pro 22.04 LTS symfony No fix yet —
Ubuntu Pro 20.04 LTS symfony No fix yet —
Ubuntu Pro 18.04 LTS symfony No fix yet —

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling nextcloud-server-33 33.0.5-r2 —

Affected packages

EcosystemPackageAffectedFixedRecord
Packagist symfony/routing < 5.4.52 5.4.52 GHSA-72xp-p242-47p9
Packagist symfony/routing >= 6.0.0, < 6.4.40 6.4.40 GHSA-72xp-p242-47p9
Packagist symfony/routing >= 7.0.0, < 7.4.12 7.4.12 GHSA-72xp-p242-47p9
Packagist symfony/routing >= 8.0.0, < 8.0.12 8.0.12 GHSA-72xp-p242-47p9
Packagist symfony/symfony < 5.4.52 5.4.52 GHSA-72xp-p242-47p9
Packagist symfony/symfony >= 6.0.0, < 6.4.40 6.4.40 GHSA-72xp-p242-47p9
Packagist symfony/symfony >= 7.0.0, < 7.4.12 7.4.12 GHSA-72xp-p242-47p9
Packagist symfony/symfony >= 8.0.0, < 8.0.12 8.0.12 GHSA-72xp-p242-47p9

References