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

Vulnerability from cvelistv5 – Published: 2026-07-14 19:04 – Updated: 2026-07-15 13:27
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
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-15 13:23 UTC
CWE
  • CWE-172 - Encoding Error
  • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
References
Impacted products
Vendor Product Version CPE status
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
guessed Create a notification for this product.
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
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-48784",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-15T13:23:18.119617Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-15T13:27:22.254Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "symfony",
          "vendor": "symfony",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.4.53"
            },
            {
              "status": "affected",
              "version": "\u003e= 6.0.0-BETA1, \u003c 6.4.41"
            },
            {
              "status": "affected",
              "version": "\u003e= 7.0.0-BETA1, \u003c 7.4.13"
            },
            {
              "status": "affected",
              "version": "\u003e= 8.0.0-BETA1, \u003c 8.0.13"
            }
          ]
        },
        {
          "product": "routing",
          "vendor": "symfony",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.4.53"
            },
            {
              "status": "affected",
              "version": "\u003e= 6.0.0-BETA1, \u003c 6.4.41"
            },
            {
              "status": "affected",
              "version": "\u003e= 7.0.0-BETA1, \u003c 7.4.13"
            },
            {
              "status": "affected",
              "version": "\u003e= 8.0.0-BETA1, \u003c 8.0.13"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "ACTIVE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-172",
              "description": "CWE-172: Encoding Error",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-601",
              "description": "CWE-601: URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-14T19:04:20.058Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/symfony/symfony/security/advisories/GHSA-h5x3-xfc9-m39h",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/symfony/symfony/security/advisories/GHSA-h5x3-xfc9-m39h"
        },
        {
          "name": "https://github.com/symfony/symfony/commit/4b63c3a3f7af04ecd79c89a594b0b02a01990b1d",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/symfony/symfony/commit/4b63c3a3f7af04ecd79c89a594b0b02a01990b1d"
        },
        {
          "name": "https://github.com/symfony/symfony/releases/tag/v5.4.53",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/symfony/symfony/releases/tag/v5.4.53"
        },
        {
          "name": "https://github.com/symfony/symfony/releases/tag/v6.4.41",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/symfony/symfony/releases/tag/v6.4.41"
        },
        {
          "name": "https://github.com/symfony/symfony/releases/tag/v7.4.13",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/symfony/symfony/releases/tag/v7.4.13"
        }
      ],
      "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"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-48784",
    "datePublished": "2026-07-14T19:04:20.058Z",
    "dateReserved": "2026-05-22T20:18:20.365Z",
    "dateUpdated": "2026-07-15T13:27:22.254Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-48784",
      "date": "2026-09-23",
      "epss": "0.00348",
      "percentile": "0.28528"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "symfony",
                "vendor": "symfony",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 5.4.53"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 6.0.0-BETA1, \u003c 6.4.41"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 7.0.0-BETA1, \u003c 7.4.13"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 8.0.0-BETA1, \u003c 8.0.13"
                  }
                ]
              },
              {
                "product": "routing",
                "vendor": "symfony",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 5.4.53"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 6.0.0-BETA1, \u003c 6.4.41"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 7.0.0-BETA1, \u003c 7.4.13"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 8.0.0-BETA1, \u003c 8.0.13"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "846D386D-95F4-4296-AA75-8276D422CF7D",
                    "versionEndExcluding": "5.4.53",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "F013030F-C3D8-4159-9C19-6641D434FA41",
                    "versionEndExcluding": "6.4.41",
                    "versionStartIncluding": "6.0.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "DCEA8689-899C-4D73-A6D9-D1988462146D",
                    "versionEndExcluding": "7.4.13",
                    "versionStartIncluding": "7.0.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "3175EFA6-84DF-4B04-B435-E71A770646C9",
                    "versionEndExcluding": "8.0.13",
                    "versionStartIncluding": "8.0.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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."
          }
        ],
        "id": "CVE-2026-48784",
        "lastModified": "2026-07-15T14:44:46.860",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 6.1,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "LOW",
                "privilegesRequired": "NONE",
                "scope": "CHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 2.7,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ],
          "cvssMetricV40": [
            {
              "cvssData": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "availabilityRequirement": "NOT_DEFINED",
                "baseScore": 5.1,
                "baseSeverity": "MEDIUM",
                "confidentialityRequirement": "NOT_DEFINED",
                "exploitMaturity": "NOT_DEFINED",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "LOW",
                "subIntegrityImpact": "LOW",
                "userInteraction": "ACTIVE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "NONE",
                "vulnIntegrityImpact": "NONE",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-48784",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "yes"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-15T13:23:18.119617Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-07-14T20:17:10.517",
        "references": [
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Patch"
            ],
            "url": "https://github.com/symfony/symfony/commit/4b63c3a3f7af04ecd79c89a594b0b02a01990b1d"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Product",
              "Release Notes"
            ],
            "url": "https://github.com/symfony/symfony/releases/tag/v5.4.53"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Product",
              "Release Notes"
            ],
            "url": "https://github.com/symfony/symfony/releases/tag/v6.4.41"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Product",
              "Release Notes"
            ],
            "url": "https://github.com/symfony/symfony/releases/tag/v7.4.13"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://github.com/symfony/symfony/security/advisories/GHSA-h5x3-xfc9-m39h"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-172"
              },
              {
                "lang": "en",
                "value": "CWE-601"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-48784",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-07-15T13:23:18.119617Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-07-15T13:23:18.829Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "symfony",
              "vendor": "symfony",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c 5.4.53"
                },
                {
                  "status": "affected",
                  "version": "\u003e= 6.0.0-BETA1, \u003c 6.4.41"
                },
                {
                  "status": "affected",
                  "version": "\u003e= 7.0.0-BETA1, \u003c 7.4.13"
                },
                {
                  "status": "affected",
                  "version": "\u003e= 8.0.0-BETA1, \u003c 8.0.13"
                }
              ]
            },
            {
              "product": "routing",
              "vendor": "symfony",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c 5.4.53"
                },
                {
                  "status": "affected",
                  "version": "\u003e= 6.0.0-BETA1, \u003c 6.4.41"
                },
                {
                  "status": "affected",
                  "version": "\u003e= 7.0.0-BETA1, \u003c 7.4.13"
                },
                {
                  "status": "affected",
                  "version": "\u003e= 8.0.0-BETA1, \u003c 8.0.13"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "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."
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "baseScore": 5.1,
                "baseSeverity": "MEDIUM",
                "privilegesRequired": "NONE",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "LOW",
                "subIntegrityImpact": "LOW",
                "userInteraction": "ACTIVE",
                "vectorString": "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",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "NONE",
                "vulnIntegrityImpact": "NONE"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-172",
                  "description": "CWE-172: Encoding Error",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            },
            {
              "descriptions": [
                {
                  "cweId": "CWE-601",
                  "description": "CWE-601: URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-07-14T19:04:20.058Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/symfony/symfony/security/advisories/GHSA-h5x3-xfc9-m39h",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/symfony/symfony/security/advisories/GHSA-h5x3-xfc9-m39h"
            },
            {
              "name": "https://github.com/symfony/symfony/commit/4b63c3a3f7af04ecd79c89a594b0b02a01990b1d",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/symfony/symfony/commit/4b63c3a3f7af04ecd79c89a594b0b02a01990b1d"
            },
            {
              "name": "https://github.com/symfony/symfony/releases/tag/v5.4.53",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/symfony/symfony/releases/tag/v5.4.53"
            },
            {
              "name": "https://github.com/symfony/symfony/releases/tag/v6.4.41",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/symfony/symfony/releases/tag/v6.4.41"
            },
            {
              "name": "https://github.com/symfony/symfony/releases/tag/v7.4.13",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/symfony/symfony/releases/tag/v7.4.13"
            }
          ],
          "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"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-48784",
        "datePublished": "2026-07-14T19:04:20.058Z",
        "dateReserved": "2026-05-22T20:18:20.365Z",
        "dateUpdated": "2026-07-15T13:27:22.254Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.