CVE-2026-54683

Status: DeferredMedium (6.5)—

Severity6.5Medium · CVSS 3.1

Exploitation probability0.33 %higher than 25% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitNot knownno public code found

NL Portal Backend Libraries provide backend components for Dutch government portals that interact with residents, customers, suppliers, and partner organizations. Prior to 3.0.3, both the getDocumentContent GraphQL query and GET /api/documentapi/{documentapi}/document/{documentId}/content REST route allow any authenticated portal user to retrieve a document without checking ownership of or another authorized relationship to it. A user with a valid login and another person's document identifier can read that document's contents, which may include sensitive personal information. Document identifiers are random and difficult to guess, but they can leak through other channels. This issue is fixed in version 3.0.3.

CVSS

Base score: 6.5
Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.33 %
Percentile among all scored CVEs: 25
Score date: 10/21/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1210 Exploitation of Remote Serviceslateral movement80 %
Primary impactT1005 Data from Local Systemcollection70 %

Vector AV:N/PR:L/UI:N con C:H: cualquier usuario autenticado lee documentos ajenos por GraphQL o REST sin verificar propiedad (CWE-639), pudiendo exponer datos personales.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

ATT&CK mitigations that cover these techniques

Vulnerability Scanning Threat Intelligence Program Privileged Account Management Network Segmentation Disable or Remove Feature or Program Application Isolation and Sandboxing

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

NL Portal Backend Libraries — NL Portal Backend Libraries^AI

CWEs

CWE-285, CWE-639

References

Show 6 references

Raw JSON (NVD)

Show

{
  "id": "CVE-2026-54683",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "nl-portal",
          "product": "nl-portal-backend-libraries",
          "versions": [
            {
              "status": "affected",
              "version": "< 3.0.3"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-10-15T18:17:27.003",
  "references": [
    {
      "url": "https://github.com/nl-portal/nl-portal-backend-libraries/commit/6e738a876ff9f581991b5b070706100b5516e183",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/nl-portal/nl-portal-backend-libraries/commit/e326e6db862f71f76dd46d3b17cbb5fa6f2fba02",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/nl-portal/nl-portal-backend-libraries/pull/684",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/nl-portal/nl-portal-backend-libraries/pull/690",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/nl-portal/nl-portal-backend-libraries/releases/tag/3.0.3.RELEASE",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/nl-portal/nl-portal-backend-libraries/security/advisories/GHSA-jr45-52cw-69h5",
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-285"
        },
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "NL Portal Backend Libraries provide backend components for Dutch government portals that interact with residents, customers, suppliers, and partner organizations. Prior to 3.0.3, both the getDocumentContent GraphQL query and GET /api/documentapi/{documentapi}/document/{documentId}/content REST route allow any authenticated portal user to retrieve a document without checking ownership of or another authorized relationship to it. A user with a valid login and another person's document identifier can read that document's contents, which may include sensitive personal information. Document identifiers are random and difficult to guess, but they can leak through other channels. This issue is fixed in version 3.0.3."
    }
  ],
  "lastModified": "2026-10-16T20:04:29.760",
  "sourceIdentifier": "security-advisories@github.com"
}