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CVE-2026-45065

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

Description (CNA)

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 (CNA)

Vendor / productVersions
symfony / symfonyaffected < 5.4.52; affected >= 6.0.0-BETA1, < 6.4.40; affected >= 7.0.0-BETA1, < 7.4.12; affected >= 8.0.0-BETA1, < 8.0.12

CWE

CWE-185, CWE-601

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.