{"id":"CVE-2026-16027","aliases":["EUVD-2026-54397","GHSA-jxrw-hc36-36pw"],"status":"published","title":"Unauthenticated WebSocket-to-XAdES SSRF in Revenue Administration's E-Signature","description":"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.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0024,"percentile":0.15167,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-918"],"published":"2026-08-07T07:14:12Z","modified":"2026-10-23T21:10:00Z","products":[{"vendor":"revenue administration","product":"e-signature"}],"references":[{"url":"https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0772","tags":["government-resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16027"},{"url":"https://github.com/advisories/GHSA-jxrw-hc36-36pw"}],"sources":{"cve":[{"id":"CVE-2026-16027","title":"Unauthenticated WebSocket-to-XAdES SSRF in Revenue Administration's E-Signature","description":"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.","status":"published","published":"2026-08-07T07:14:12.771Z","modified":"2026-08-07T15:24:12.519Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T14:20:10.870108Z"}],"euvd":[{"id":"EUVD-2026-54397","description":"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.","status":"published","published":"2026-08-07T07:14:12Z","modified":"2026-08-07T15:24:12Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T18:02:07.294457Z"}],"ghsa":[{"id":"GHSA-jxrw-hc36-36pw","title":"Server-Side request forgery (SSRF) vulnerability in Revenue Administration Türkiye's E-Signature...","description":"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.","status":"published","published":"2026-08-07T09:31:52Z","modified":"2026-08-07T09:31:53Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T15:10:11.041675Z"}],"nvd":[{"id":"CVE-2026-16027","description":"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.","status":"published","published":"2026-08-07T08:16:46.023Z","modified":"2026-10-23T21:10:00.157Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T14:12:35.386166Z"}]}}