CVE-2026-16027

Full vulnerability record from the local CVENow database.

Description

Server-Side request forgery (SSRF) vulnerability in Revenue Administration Türkiye's E-Signature allows Server Side Request Forgery. This issue affects Türkiye's E-Signature: from 2.4.4.0 before 2.5.1.0.

Severity

MEDIUM

CVSS score

5.4 (v3.1)

Vulnerability status

Deferred

Source identifier

[email protected]

Published

2026-08-07 08:16:46.023000

Last modified

2026-10-23 21:10:00.157000

View original CVE JSON

{
  "id": "CVE-2026-16027",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-07T08:16:46.023",
  "lastModified": "2026-10-23T21:10:00.157",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Server-Side request forgery (SSRF) vulnerability in Revenue Administration Türkiye's E-Signature allows Server Side Request Forgery.\n\nThis issue affects Türkiye's E-Signature: from 2.4.4.0 before 2.5.1.0."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de falsificación de petición del lado del servidor (SSRF) en la E-Signature de la Administración Tributaria de Turquía permite la falsificación de petición del lado del servidor.\n\nEste problema afecta a la E-Signature de Turquía: desde 2.4.4.0 antes de 2.5.1.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Revenue Administration",
          "product": "E-Signature",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2.4.4.0",
              "lessThan": "2.5.1.0",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-07T15:23:01.841632Z",
          "id": "CVE-2026-16027",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0772",
      "source": "[email protected]"
    }
  ]
}