CVE-2026-123119 (GCVE-0-2026-123119)

Vulnerability from cvelistv5 – Published: 2026-11-05 12:57 – Updated: 2026-11-05 19:03
VLAI
Title
Symfony: NoPrivateNetworkHttpClient Does Not Pin the Checked IP of Cached Hosts, Letting DNS Rebinding Enumerate Internal Ports (Incomplete Fix for CVE-2024-50342)
Summary
The Symfony HttpClient component NoPrivateNetworkHttpClient does not pin the checked IP address of cached hosts, allowing for DNS rebinding to bypass private network restrictions, resulting in enumeration of internal hosts and ports in Symfony versions prior to 5.4.56, 6.x prior to 6.4.50, 7.x prior to 7.4.23, and 8.x prior to 8.1.11. NoPrivateNetworkHttpClient resolves the host of each request and checks the IP before connecting. It caches the result per host, and passes the IP to the decorated client through the resolve option so that the client connects to the exact IP that was checked. The issue is that resolve was only passed on the first lookup of a host: on subsequent requests, the decorated client resolved the host again on its own. An attacker who controls a host's DNS can exploit this with DNS rebinding by answering the first lookup with a public IP, and subsequent lookups with a private IP, so when an application sends several requests to that host through the same client, the later requests connect to the private IP. This happens, for example, when an application fetches several URLs of a repository provided by a user. The check of the primary_ip in the on_progress callback still aborts the request before anything is sent, but the connection is made, and the error differs depending on whether the port is open or closed. This allows enumerating internal hosts and ports, as in CVE-2024-50342.
Severity
2.3 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 14:13 UTC
CWE
  • CWE-367 - Time-of-check time-of-use (TOCTOU) race condition
  • CWE-918 - Server-Side request forgery (SSRF)
Assigner
Checkmarx CNA under the mitre root
CNA scorecard B 88/100 over 15 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
sensiolabs symfony Affected: 0 , < 5.4.56 (git)
Affected: 6.0.0 , < 6.4.50 (git)
Affected: 7.0.0 , < 7.4.23 (git)
Affected: 8.0.0 , < 8.1.11 (git)
guessed Create a notification for this product.
Credits
Eirik Stanghelle Morland from Packagist Nicolas Grekas
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-123119",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-05T14:13:38.399973Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-11-05T19:03:19.483Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://packagist.org/packages/symfony/http-client",
          "defaultStatus": "unaffected",
          "modules": [
            "Symfony\\Component\\HttpClient\\NoPrivateNetworkHttpClient"
          ],
          "packageName": "symfony/http-client",
          "product": "symfony",
          "repo": "https://github.com/symfony/http-client",
          "vendor": "sensiolabs",
          "versions": [
            {
              "lessThan": "5.4.56",
              "status": "affected",
              "version": "0",
              "versionType": "git"
            },
            {
              "lessThan": "6.4.50",
              "status": "affected",
              "version": "6.0.0",
              "versionType": "git"
            },
            {
              "lessThan": "7.4.23",
              "status": "affected",
              "version": "7.0.0",
              "versionType": "git"
            },
            {
              "lessThan": "8.1.11",
              "status": "affected",
              "version": "8.0.0",
              "versionType": "git"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Eirik Stanghelle Morland from Packagist"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Nicolas Grekas"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cdiv\u003eThe Symfony HttpClient component\u0026nbsp;\u003ccode\u003eNoPrivateNetworkHttpClient\u003c/code\u003e\u0026nbsp;does not pin the checked IP address of cached hosts, allowing for DNS rebinding to bypass private network restrictions, resulting in enumeration of internal hosts and ports in Symfony versions prior to 5.4.56, 6.x prior to 6.4.50, 7.x prior to 7.4.23, and 8.x prior to 8.1.11.\u003c/div\u003e\u003cdiv\u003e\u003ccode\u003eNoPrivateNetworkHttpClient\u003c/code\u003e resolves the host of each request and checks the IP before connecting. It caches the result per host, and passes the IP to the decorated client through the\u0026nbsp;\u003ccode\u003eresolve\u003c/code\u003e option so that the client connects to the exact IP that was checked. The issue is that\u0026nbsp;\u003ccode\u003eresolve\u003c/code\u003e\u003cspan\u003e was only passed on the first lookup of a host: on subsequent requests, the decorated client resolved the host again on its own.\u003c/span\u003e\u003c/div\u003e\u003cdiv\u003eAn attacker who controls a host\u0027s DNS can exploit this with DNS rebinding by answering the first lookup with a public IP, and subsequent lookups with a private IP, so when an application sends several requests to that host through the same client, the later requests connect to the private IP. This happens, for example, when an application fetches several URLs of a repository provided by a user. The check of the\u0026nbsp;\u003ccode\u003eprimary_ip\u003c/code\u003e\u0026nbsp;in the\u0026nbsp;\u003ccode\u003eon_progress\u003c/code\u003e\u0026nbsp;callback still aborts the request before anything is sent, but the connection is made, and the error differs depending on whether the port is open or closed. This allows enumerating internal hosts and ports, as in CVE-2024-50342.\u003c/div\u003e"
            }
          ],
          "value": "The Symfony HttpClient component\u00a0NoPrivateNetworkHttpClient\u00a0does not pin the checked IP address of cached hosts, allowing for DNS rebinding to bypass private network restrictions, resulting in enumeration of internal hosts and ports in Symfony versions prior to 5.4.56, 6.x prior to 6.4.50, 7.x prior to 7.4.23, and 8.x prior to 8.1.11.\n\nNoPrivateNetworkHttpClient resolves the host of each request and checks the IP before connecting. It caches the result per host, and passes the IP to the decorated client through the\u00a0resolve option so that the client connects to the exact IP that was checked. The issue is that\u00a0resolve was only passed on the first lookup of a host: on subsequent requests, the decorated client resolved the host again on its own.\n\nAn attacker who controls a host\u0027s DNS can exploit this with DNS rebinding by answering the first lookup with a public IP, and subsequent lookups with a private IP, so when an application sends several requests to that host through the same client, the later requests connect to the private IP. This happens, for example, when an application fetches several URLs of a repository provided by a user. The check of the\u00a0primary_ip\u00a0in the\u00a0on_progress\u00a0callback still aborts the request before anything is sent, but the connection is made, and the error differs depending on whether the port is open or closed. This allows enumerating internal hosts and ports, as in CVE-2024-50342."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 2.3,
            "baseSeverity": "LOW",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-367",
              "description": "CWE-367 Time-of-check time-of-use (TOCTOU) race condition",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918 Server-Side request forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-05T12:57:35.267Z",
        "orgId": "596c5446-0ce5-4ba2-aa66-48b3b757a647",
        "shortName": "Checkmarx"
      },
      "references": [
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://github.com/symfony/symfony/security/advisories/GHSA-c7hm-wqwp-f9v8"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/symfony/symfony/commit/ab084826b2b5db8d0b91af635fe2b5e1c4f699f9"
        }
      ],
      "source": {
        "advisory": "GHSA-c7hm-wqwp-f9v8",
        "discovery": "UNKNOWN"
      },
      "title": "Symfony: NoPrivateNetworkHttpClient Does Not Pin the Checked IP of Cached Hosts, Letting DNS Rebinding Enumerate Internal Ports (Incomplete Fix for CVE-2024-50342)",
      "x_generator": {
        "engine": "Vulnogram 1.0.5"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "596c5446-0ce5-4ba2-aa66-48b3b757a647",
    "assignerShortName": "Checkmarx",
    "cveId": "CVE-2026-123119",
    "datePublished": "2026-11-05T12:57:35.267Z",
    "dateReserved": "2026-11-05T12:32:19.431Z",
    "dateUpdated": "2026-11-05T19:03:19.483Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "collectionURL": "https://packagist.org/packages/symfony/http-client",
                "defaultStatus": "unaffected",
                "modules": [
                  "Symfony\\Component\\HttpClient\\NoPrivateNetworkHttpClient"
                ],
                "packageName": "symfony/http-client",
                "product": "symfony",
                "repo": "https://github.com/symfony/http-client",
                "vendor": "sensiolabs",
                "versions": [
                  {
                    "lessThan": "5.4.56",
                    "status": "affected",
                    "version": "0",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "6.4.50",
                    "status": "affected",
                    "version": "6.0.0",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "7.4.23",
                    "status": "affected",
                    "version": "7.0.0",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "8.1.11",
                    "status": "affected",
                    "version": "8.0.0",
                    "versionType": "git"
                  }
                ]
              }
            ],
            "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "The Symfony HttpClient component\u00a0NoPrivateNetworkHttpClient\u00a0does not pin the checked IP address of cached hosts, allowing for DNS rebinding to bypass private network restrictions, resulting in enumeration of internal hosts and ports in Symfony versions prior to 5.4.56, 6.x prior to 6.4.50, 7.x prior to 7.4.23, and 8.x prior to 8.1.11.\n\nNoPrivateNetworkHttpClient resolves the host of each request and checks the IP before connecting. It caches the result per host, and passes the IP to the decorated client through the\u00a0resolve option so that the client connects to the exact IP that was checked. The issue is that\u00a0resolve was only passed on the first lookup of a host: on subsequent requests, the decorated client resolved the host again on its own.\n\nAn attacker who controls a host\u0027s DNS can exploit this with DNS rebinding by answering the first lookup with a public IP, and subsequent lookups with a private IP, so when an application sends several requests to that host through the same client, the later requests connect to the private IP. This happens, for example, when an application fetches several URLs of a repository provided by a user. The check of the\u00a0primary_ip\u00a0in the\u00a0on_progress\u00a0callback still aborts the request before anything is sent, but the connection is made, and the error differs depending on whether the port is open or closed. This allows enumerating internal hosts and ports, as in CVE-2024-50342."
          }
        ],
        "id": "CVE-2026-123119",
        "lastModified": "2026-11-05T19:17:17.493",
        "metrics": {
          "cvssMetricV40": [
            {
              "cvssData": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "PRESENT",
                "attackVector": "NETWORK",
                "availabilityRequirement": "NOT_DEFINED",
                "baseScore": 2.3,
                "baseSeverity": "LOW",
                "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": "LOW",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "LOW",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/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": "596c5446-0ce5-4ba2-aa66-48b3b757a647",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-123119",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-05T14:13:38.399973Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-11-05T13:17:07.640",
        "references": [
          {
            "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647",
            "url": "https://github.com/symfony/symfony/commit/ab084826b2b5db8d0b91af635fe2b5e1c4f699f9"
          },
          {
            "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647",
            "url": "https://github.com/symfony/symfony/security/advisories/GHSA-c7hm-wqwp-f9v8"
          }
        ],
        "sourceIdentifier": "596c5446-0ce5-4ba2-aa66-48b3b757a647",
        "vulnStatus": "Received",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-367"
              },
              {
                "lang": "en",
                "value": "CWE-918"
              }
            ],
            "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    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.