FKIE_CVE-2026-31818

Vulnerability from fkie_nvd - Published: 2026-04-03 16:16 - Updated: 2026-04-03 16:16
Severity ?
9.6 (Critical) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Summary
Budibase is an open-source low-code platform. Prior to version 3.33.4, a server-side request forgery (SSRF) vulnerability exists in Budibase's REST datasource connector. The platform's SSRF protection mechanism (IP blacklist) is rendered completely ineffective because the BLACKLIST_IPS environment variable is not set by default in any of the official deployment configurations. When this variable is empty, the blacklist function unconditionally returns false, allowing all requests through without restriction. This issue has been patched in version 3.33.4.
References
security-advisories@github.comhttps://github.com/Budibase/budibase/commit/5b0fe83d4ece52696b62589cba89ef50cc009732
security-advisories@github.comhttps://github.com/Budibase/budibase/pull/18236
security-advisories@github.comhttps://github.com/Budibase/budibase/releases/tag/3.33.4
security-advisories@github.comhttps://github.com/Budibase/budibase/security/advisories/GHSA-7r9j-r86q-7g45
Impacted products
Vendor Product Version
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Budibase is an open-source low-code platform. Prior to version 3.33.4, a server-side request forgery (SSRF) vulnerability exists in Budibase\u0027s REST datasource connector. The platform\u0027s SSRF protection mechanism (IP blacklist) is rendered completely ineffective because the BLACKLIST_IPS environment variable is not set by default in any of the official deployment configurations. When this variable is empty, the blacklist function unconditionally returns false, allowing all requests through without restriction. This issue has been patched in version 3.33.4."
    }
  ],
  "id": "CVE-2026-31818",
  "lastModified": "2026-04-03T16:16:39.800",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 9.6,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 5.8,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-04-03T16:16:39.800",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/Budibase/budibase/commit/5b0fe83d4ece52696b62589cba89ef50cc009732"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/Budibase/budibase/pull/18236"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/Budibase/budibase/releases/tag/3.33.4"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/Budibase/budibase/security/advisories/GHSA-7r9j-r86q-7g45"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        },
        {
          "lang": "en",
          "value": "CWE-1188"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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Sightings

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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.