Vulnerability · Published Aug 7, 2026 · Assigned by TR-CERT
CVE-2026-16027Unauthenticated WebSocket-to-XAdES SSRF in Revenue Administration's E-Signature
Medium 5.4
In plain English
A medium-severity server-side request forgery in E-Signature from Revenue Administration. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.2%top 84.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Revenue Administration | E-Signature | 2.4.4.0 – before 2.5.1.0 |
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
References
- https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0772 government-resource