{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-16027", "assignerOrgId": "ca940d4e-fea4-4aa2-9a58-591a58b1ce21", "state": "PUBLISHED", "assignerShortName": "TR-CERT", "dateReserved": "2026-07-17T08:21:50.945Z", "datePublished": "2026-08-07T07:14:12.771Z", "dateUpdated": "2026-08-07T08:54:04.344Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "ca940d4e-fea4-4aa2-9a58-591a58b1ce21", "shortName": "TR-CERT", "dateUpdated": "2026-08-07T08:54:04.344Z"}, "title": "Unauthenticated WebSocket-to-XAdES SSRF in Revenue Administration's E-Signature", "datePublic": "2026-08-07T07:09:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-918", "description": "CWE-918 Server-Side request forgery (SSRF)", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-664", "descriptions": [{"lang": "en", "value": "CAPEC-664 Server Side Request Forgery"}]}], "affected": [{"vendor": "Revenue Administration", "product": "E-Signature", "versions": [{"status": "affected", "version": "2.4.4.0", "lessThan": "2.5.1.0", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Server-Side request forgery (SSRF) vulnerability in Revenue Administration T\u00fcrkiye's E-Signature allows Server Side Request Forgery.\n\nThis issue affects T\u00fcrkiye's E-Signature: from 2.4.4.0 before 2.5.1.0.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Server-Side request forgery (SSRF) vulnerability in Revenue Administration T\u00fcrkiye's E-Signature allows Server Side Request Forgery.<p>This issue affects T\u00fcrkiye's E-Signature: from 2.4.4.0 before 2.5.1.0.</p>"}]}], "references": [{"url": "https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0772", "tags": ["government-resource"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseSeverity": "MEDIUM", "baseScore": 5.4, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"}}], "credits": [{"lang": "en", "value": "Sangsoo Jeong", "type": "finder"}], "source": {"defect": ["TR-26-0772"], "advisory": "TR-26-0772", "discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.4"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[2.4.4.0,2.5.1.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "T\u00fcrkiye's E-Signature", "source": "cna", "vendor": "Revenue Administration"}, "product": "t\u00fcrkiye's_e-signature", "vendor": "revenue_administration"}], "created": "2026-08-07T08:30:04.049339+00:00", "updated": "2026-08-07T09:58:22.652326+00:00", "vendors": ["revenue_administration", "revenue_administration$PRODUCT$t\u00fcrkiye's_e-signature"]}