CVE-2026-48784

CVE-2026-48784 is a Symfony UrlGenerator issue in UrlGenerator::doGenerate() where strtr dot-segment encoding skipped every other chained ../ or ./ segments. This allowed attacker-controlled route parameters to generate URLs that collapse to a different path under RFC 3986 normalization. The vuln...

CVE-2026-48784 Symfony: UrlGenerator Dot-Segment Encoding Skips Every Other Chained `../` or `./` → Generated URL Collapses Off-Route Under RFC 3986 Normalization

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.53, 6.4.41, 7.4.13, and 8.0.13, UrlGenerator::doGenerate used strtr dot-segment encoding that skipped every other chained ../ or ./ segment, allowing attacker-controlled route parameters...

Symfony: UrlGenerator Dot-Segment Encoding Skips Every Other Chained `../` or `./` → Generated URL Collapses Off-Route Under RFC 3986 Normalization

Description Symfony\Component\Routing\Generator\UrlGenerator::doGenerate percent-encodes . and .. path segments so that the generated URL still resolves to the originating route after RFC 3986 §5.2.4 dot-segment removal which strict RFC-3986 consumers — routers, reverse proxies, HTTP clients —...

CVE-2026-48784: UrlGenerator Dot-Segment Encoding Skips Every Other Chained `../` or `./` → Generated URL Collapses Off-Route Under RFC 3986 Normalization

More info at https://symfony.com/cve-2026-48784...

CVE-2026-48784: UrlGenerator Dot-Segment Encoding Skips Every Other Chained `../` or `./` → Generated URL Collapses Off-Route Under RFC 3986 Normalization

More info at https://symfony.com/cve-2026-48784...