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CVE PROGRAM SOURCE RECORD5.1 Medium

CVE-2026-48784

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

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Status
Published
Published
Updated
Assigning organization
GitHub_M

Description

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 to generate URLs that collapse to a different path under RFC 3986 normalization. This issue is fixed in versions 5.4.53, 6.4.41, 7.4.13, and 8.0.13.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

symfony symfony

  • < 5.4.53affected
  • >= 6.0.0-BETA1, < 6.4.41affected
  • >= 7.0.0-BETA1, < 7.4.13affected
  • >= 8.0.0-BETA1, < 8.0.13affected

symfony routing

  • < 5.4.53affected
  • >= 6.0.0-BETA1, < 6.4.41affected
  • >= 7.0.0-BETA1, < 7.4.13affected
  • >= 8.0.0-BETA1, < 8.0.13affected

References