CVE-2026-48784 (GCVE-0-2026-48784)

Vulnerability from cvelistv5 – Published: 2026-07-14 19:04 – Updated: 2026-07-14 19:04
VLAI
Title
Symfony: UrlGenerator Dot-Segment Encoding Skips Every Other Chained `../` or `./` → Generated URL Collapses Off-Route Under RFC 3986 Normalization
Summary
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.
Severity
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CWE
  • CWE-172 - Encoding Error
  • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
References
Impacted products
Vendor Product Version
symfony symfony Affected: < 5.4.53
Affected: >= 6.0.0-BETA1, < 6.4.41
Affected: >= 7.0.0-BETA1, < 7.4.13
Affected: >= 8.0.0-BETA1, < 8.0.13
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symfony routing Affected: < 5.4.53
Affected: >= 6.0.0-BETA1, < 6.4.41
Affected: >= 7.0.0-BETA1, < 7.4.13
Affected: >= 8.0.0-BETA1, < 8.0.13
Create a notification for this product.
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          "versions": [
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              "status": "affected",
              "version": "\u003e= 7.0.0-BETA1, \u003c 7.4.13"
            },
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            }
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              "version": "\u003c 5.4.53"
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              "status": "affected",
              "version": "\u003e= 6.0.0-BETA1, \u003c 6.4.41"
            },
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              "status": "affected",
              "version": "\u003e= 7.0.0-BETA1, \u003c 7.4.13"
            },
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        }
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            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
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            "version": "4.0",
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        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
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          "url": "https://github.com/symfony/symfony/security/advisories/GHSA-h5x3-xfc9-m39h"
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        {
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        },
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          "url": "https://github.com/symfony/symfony/releases/tag/v6.4.41"
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          "url": "https://github.com/symfony/symfony/releases/tag/v7.4.13"
        }
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      "source": {
        "advisory": "GHSA-h5x3-xfc9-m39h",
        "discovery": "UNKNOWN"
      },
      "title": "Symfony: UrlGenerator Dot-Segment Encoding Skips Every Other Chained `../` or `./` \u2192 Generated URL Collapses Off-Route Under RFC 3986 Normalization"
    }
  },
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-48784",
    "datePublished": "2026-07-14T19:04:20.058Z",
    "dateReserved": "2026-05-22T20:18:20.365Z",
    "dateUpdated": "2026-07-14T19:04:20.058Z",
    "state": "PUBLISHED"
  },
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      "date": "2026-06-14",
      "epss": "0.00026",
      "percentile": "0.07685"
    },
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}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.