Vulnerability-Lookup

CVE-2026-35219 (GCVE-0-2026-35219)

Vulnerability from cvelistv5 – Published: 2026-08-17 20:28 – Updated: 2026-08-18 12:37

Title

Budibase: SSRF in Automation Steps - Webhook, Zapier, N8N, Slack, Discord Bypass IP Blacklist

Summary

Budibase is an open-source low-code platform. Prior to 3.41.3, automation steps in packages/server/src/automations/steps/outgoingWebhook.ts, packages/server/src/automations/steps/zapier.ts, packages/server/src/automations/steps/n8n.ts, packages/server/src/automations/steps/slack.ts, and packages/server/src/automations/steps/discord.ts use node-fetch on user-provided URLs without the BLACKLIST_IPS enforcement used by the REST integration, allowing an authenticated user to make server-side requests to cloud metadata and internal services. This issue is fixed in version 3.41.3.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-18 12:35 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/Budibase/budibase/security/adv…	x_refsource_CONFIRM
https://github.com/Budibase/budibase/pull/19328	x_refsource_MISC
https://github.com/Budibase/budibase/commit/cc075…	x_refsource_MISC
https://github.com/Budibase/budibase/releases/tag…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
Budibase	budibase	Affected: < 3.41.3	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-35219",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-18T12:35:43.695109Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-18T12:37:02.273Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/Budibase/budibase/security/advisories/GHSA-5fpj-28rv-84r7"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "budibase",
          "vendor": "Budibase",
          "versions": [
            {
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              "version": "\u003c 3.41.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Budibase is an open-source low-code platform. Prior to 3.41.3, automation steps in packages/server/src/automations/steps/outgoingWebhook.ts, packages/server/src/automations/steps/zapier.ts, packages/server/src/automations/steps/n8n.ts, packages/server/src/automations/steps/slack.ts, and packages/server/src/automations/steps/discord.ts use node-fetch on user-provided URLs without the BLACKLIST_IPS enforcement used by the REST integration, allowing an authenticated user to make server-side requests to cloud metadata and internal services. This issue is fixed in version 3.41.3."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
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            "vulnIntegrityImpact": "LOW"
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              "lang": "en",
              "type": "CWE"
            }
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T20:28:40.828Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/Budibase/budibase/security/advisories/GHSA-5fpj-28rv-84r7",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/Budibase/budibase/security/advisories/GHSA-5fpj-28rv-84r7"
        },
        {
          "name": "https://github.com/Budibase/budibase/pull/19328",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/Budibase/budibase/pull/19328"
        },
        {
          "name": "https://github.com/Budibase/budibase/commit/cc07563a6b0fc0f91c51aae295952b1295546a90",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/Budibase/budibase/commit/cc07563a6b0fc0f91c51aae295952b1295546a90"
        },
        {
          "name": "https://github.com/Budibase/budibase/releases/tag/3.41.3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/Budibase/budibase/releases/tag/3.41.3"
        }
      ],
      "source": {
        "advisory": "GHSA-5fpj-28rv-84r7",
        "discovery": "UNKNOWN"
      },
      "title": "Budibase: SSRF in Automation Steps - Webhook, Zapier, N8N, Slack, Discord Bypass IP Blacklist"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-35219",
    "datePublished": "2026-08-17T20:28:40.828Z",
    "dateReserved": "2026-04-01T18:48:58.938Z",
    "dateUpdated": "2026-08-18T12:37:02.273Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-09-24",
      "epss": "0.00465",
      "percentile": "0.37532"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "budibase",
                "vendor": "Budibase",
                "versions": [
                  {
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                    "version": "\u003c 3.41.3"
                  }
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            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Budibase is an open-source low-code platform. Prior to 3.41.3, automation steps in packages/server/src/automations/steps/outgoingWebhook.ts, packages/server/src/automations/steps/zapier.ts, packages/server/src/automations/steps/n8n.ts, packages/server/src/automations/steps/slack.ts, and packages/server/src/automations/steps/discord.ts use node-fetch on user-provided URLs without the BLACKLIST_IPS enforcement used by the REST integration, allowing an authenticated user to make server-side requests to cloud metadata and internal services. This issue is fixed in version 3.41.3."
          }
        ],
        "id": "CVE-2026-35219",
        "lastModified": "2026-09-08T21:03:08.410",
        "metrics": {
          "cvssMetricV40": [
            {
              "cvssData": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "availabilityRequirement": "NOT_DEFINED",
                "baseScore": 7.1,
                "baseSeverity": "HIGH",
                "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": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/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": "HIGH",
                "vulnIntegrityImpact": "LOW",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
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                "options": [
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                  },
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              }
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        "published": "2026-08-17T21:16:44.550",
        "references": [
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            "source": "security-advisories@github.com",
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          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/Budibase/budibase/pull/19328"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/Budibase/budibase/releases/tag/3.41.3"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/Budibase/budibase/security/advisories/GHSA-5fpj-28rv-84r7"
          },
          {
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "url": "https://github.com/Budibase/budibase/security/advisories/GHSA-5fpj-28rv-84r7"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Deferred",
        "weaknesses": [
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              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          }
        ]
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    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-35219",
                    "options": [
                      {
                        "Exploitation": "poc"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-08-18T12:35:43.695109Z",
                    "version": "2.0.3"
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            ],
            "providerMetadata": {
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            },
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                "url": "https://github.com/Budibase/budibase/security/advisories/GHSA-5fpj-28rv-84r7"
              }
            ],
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "budibase",
              "vendor": "Budibase",
              "versions": [
                {
                  "status": "affected",
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                }
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          ],
          "descriptions": [
            {
              "lang": "en",
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            }
          ],
          "metrics": [
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                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
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                "baseSeverity": "HIGH",
                "privilegesRequired": "LOW",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "LOW"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-918",
                  "description": "CWE-918: Server-Side Request Forgery (SSRF)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-17T20:28:40.828Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/Budibase/budibase/security/advisories/GHSA-5fpj-28rv-84r7",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/Budibase/budibase/security/advisories/GHSA-5fpj-28rv-84r7"
            },
            {
              "name": "https://github.com/Budibase/budibase/pull/19328",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/Budibase/budibase/pull/19328"
            },
            {
              "name": "https://github.com/Budibase/budibase/commit/cc07563a6b0fc0f91c51aae295952b1295546a90",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/Budibase/budibase/commit/cc07563a6b0fc0f91c51aae295952b1295546a90"
            },
            {
              "name": "https://github.com/Budibase/budibase/releases/tag/3.41.3",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/Budibase/budibase/releases/tag/3.41.3"
            }
          ],
          "source": {
            "advisory": "GHSA-5fpj-28rv-84r7",
            "discovery": "UNKNOWN"
          },
          "title": "Budibase: SSRF in Automation Steps - Webhook, Zapier, N8N, Slack, Discord Bypass IP Blacklist"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-35219",
        "datePublished": "2026-08-17T20:28:40.828Z",
        "dateReserved": "2026-04-01T18:48:58.938Z",
        "dateUpdated": "2026-08-18T12:37:02.273Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
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    }
  }
}

FKIE_CVE-2026-35219

Vulnerability from fkie_nvd - Published: 2026-08-17 21:16 - Updated: 2026-09-08 21:03

Severity

7.1 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/Budibase/budibase/commit/cc07563a6b0fc0f91c51aae295952b1295546a90
	security-advisories@github.com	https://github.com/Budibase/budibase/pull/19328
	security-advisories@github.com	https://github.com/Budibase/budibase/releases/tag/3.41.3
	security-advisories@github.com	https://github.com/Budibase/budibase/security/advisories/GHSA-5fpj-28rv-84r7
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/Budibase/budibase/security/advisories/GHSA-5fpj-28rv-84r7

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "budibase",
          "vendor": "Budibase",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.41.3"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Budibase is an open-source low-code platform. Prior to 3.41.3, automation steps in packages/server/src/automations/steps/outgoingWebhook.ts, packages/server/src/automations/steps/zapier.ts, packages/server/src/automations/steps/n8n.ts, packages/server/src/automations/steps/slack.ts, and packages/server/src/automations/steps/discord.ts use node-fetch on user-provided URLs without the BLACKLIST_IPS enforcement used by the REST integration, allowing an authenticated user to make server-side requests to cloud metadata and internal services. This issue is fixed in version 3.41.3."
    }
  ],
  "id": "CVE-2026-35219",
  "lastModified": "2026-09-08T21:03:08.410",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "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": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/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": "HIGH",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-35219",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
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            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-18T12:35:43.695109Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-17T21:16:44.550",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/Budibase/budibase/commit/cc07563a6b0fc0f91c51aae295952b1295546a90"
    },
    {
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      "url": "https://github.com/Budibase/budibase/pull/19328"
    },
    {
      "source": "security-advisories@github.com",
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    },
    {
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    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/Budibase/budibase/security/advisories/GHSA-5fpj-28rv-84r7"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-5FPJ-28RV-84R7

Vulnerability from github – Published: 2026-08-14 19:18 – Updated: 2026-08-14 19:18

Summary

Budibase: SSRF in Automation Steps - Webhook, Zapier, N8N, Slack, Discord Bypass IP Blacklist

Details

Summary

Budibase automation steps (outgoing webhook, Zapier, n8n, Slack, Discord, Make.com) make server-side HTTP requests to user-provided URLs using node-fetch directly, completely bypassing the IP blacklist protection that exists in the REST API integration. Additionally, the REST API blacklist itself defaults to empty when BLACKLIST_IPS is not configured.

Vulnerable Code

Automation Steps (No Blacklist)

All automation steps use fetch() directly without any IP validation:

packages/server/src/automations/steps/outgoingWebhook.ts line 69:

const response = await fetch(url, request)  // No blacklist check

packages/server/src/automations/steps/zapier.ts line 34:

response = await fetch(url, {method: "post", ...})  // No blacklist check

packages/server/src/automations/steps/n8n.ts line 53:

response = await fetch(url, request)  // No blacklist check

packages/server/src/automations/steps/slack.ts line 20:

response = await fetch(url, {method: "post", ...})  // No blacklist check

packages/server/src/automations/steps/discord.ts line 29:

response = await fetch(url, {method: "post", ...})  // No blacklist check

REST API Integration (Empty Default Blacklist)

packages/server/src/integrations/rest.ts line 684:

if (await blacklist.isBlacklisted(url)) {
  throw new Error("Cannot connect to URL.")
}

But BLACKLIST_IPS env var defaults to undefined, so the blacklist is empty:

packages/backend-core/src/blacklist/blacklist.ts lines 39-45:

if (blackListArray?.length === 0) {
  return false  // Always passes when no IPs configured
}

Impact

Automation steps: ANY user can create automations with webhook/Zapier/n8n/Slack/Discord steps pointing to internal IPs. These completely bypass the blacklist module
REST API: Even when BLACKLIST_IPS is configured, it only blocks listed IPs. Default deployments have no protection.
Cloud metadata: http://169.254.169.254/latest/meta-data/ accessible via any automation step
Internal services: Access databases, admin panels, Kubernetes API on private IPs

Remediation

Apply blacklist checks to ALL outbound HTTP requests, including automation steps
Add hardcoded default private IP ranges (127.0.0.0/8, 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, 169.254.0.0/16)
Use a centralized HTTP client wrapper instead of direct fetch() calls
SSRF protection should be on by default, not opt-in via environment variable

Severity

7.1 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@budibase/server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.41.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-35219"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-14T19:18:47Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "## Summary\n\nBudibase automation steps (outgoing webhook, Zapier, n8n, Slack, Discord, Make.com) make server-side HTTP requests to user-provided URLs using `node-fetch` directly, completely bypassing the IP blacklist protection that exists in the REST API integration. Additionally, the REST API blacklist itself defaults to empty when `BLACKLIST_IPS` is not configured.\n\n## Vulnerable Code\n\n### Automation Steps (No Blacklist)\n\nAll automation steps use `fetch()` directly without any IP validation:\n\n**`packages/server/src/automations/steps/outgoingWebhook.ts` line 69:**\n```typescript\nconst response = await fetch(url, request)  // No blacklist check\n```\n\n**`packages/server/src/automations/steps/zapier.ts` line 34:**\n```typescript\nresponse = await fetch(url, {method: \"post\", ...})  // No blacklist check\n```\n\n**`packages/server/src/automations/steps/n8n.ts` line 53:**\n```typescript\nresponse = await fetch(url, request)  // No blacklist check\n```\n\n**`packages/server/src/automations/steps/slack.ts` line 20:**\n```typescript\nresponse = await fetch(url, {method: \"post\", ...})  // No blacklist check\n```\n\n**`packages/server/src/automations/steps/discord.ts` line 29:**\n```typescript\nresponse = await fetch(url, {method: \"post\", ...})  // No blacklist check\n```\n\n### REST API Integration (Empty Default Blacklist)\n\n**`packages/server/src/integrations/rest.ts` line 684:**\n```typescript\nif (await blacklist.isBlacklisted(url)) {\n  throw new Error(\"Cannot connect to URL.\")\n}\n```\n\nBut `BLACKLIST_IPS` env var defaults to undefined, so the blacklist is empty:\n\n**`packages/backend-core/src/blacklist/blacklist.ts` lines 39-45:**\n```typescript\nif (blackListArray?.length === 0) {\n  return false  // Always passes when no IPs configured\n}\n```\n\n## Impact\n\n- **Automation steps**: ANY user can create automations with webhook/Zapier/n8n/Slack/Discord steps pointing to internal IPs. These completely bypass the blacklist module\n- **REST API**: Even when BLACKLIST_IPS is configured, it only blocks listed IPs. Default deployments have no protection.\n- **Cloud metadata**: `http://169.254.169.254/latest/meta-data/` accessible via any automation step\n- **Internal services**: Access databases, admin panels, Kubernetes API on private IPs\n\n## Remediation\n\n1. Apply blacklist checks to ALL outbound HTTP requests, including automation steps\n2. Add hardcoded default private IP ranges (127.0.0.0/8, 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, 169.254.0.0/16)\n3. Use a centralized HTTP client wrapper instead of direct `fetch()` calls\n4. SSRF protection should be on by default, not opt-in via environment variable",
  "id": "GHSA-5fpj-28rv-84r7",
  "modified": "2026-08-14T19:18:47Z",
  "published": "2026-08-14T19:18:47Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Budibase/budibase/security/advisories/GHSA-5fpj-28rv-84r7"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Budibase/budibase"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Budibase/budibase/releases/tag/3.41.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Budibase: SSRF in Automation Steps - Webhook, Zapier, N8N, Slack, Discord Bypass IP Blacklist"
}

WID-SEC-W-2026-2849

Vulnerability from csaf_certbund - Published: 2026-08-13 22:00 - Updated: 2026-08-30 22:00

Summary

Budibase: Mehrere Schwachstellen

Severity

Hoch

Scope

5 vulnerabilities in this advisory, including CVE-2026-35219.

CVE-2026-35219

Known affected: 1 product

Open the full advisory

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

CVE-2026-35219 (GCVE-0-2026-35219)

FKIE_CVE-2026-35219

GHSA-5FPJ-28RV-84R7

Summary

Vulnerable Code

Automation Steps (No Blacklist)

REST API Integration (Empty Default Blacklist)

Impact

Remediation

WID-SEC-W-2026-2849

Tags

Sightings

Nomenclature

Related by attack behaviour