What’s Vulnerable › Vulnerabilities
CVE-2026-16027: Unauthenticated WebSocket-to-XAdES SSRF in Revenue Administration's E-Signature
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-07 · updated 2026-10-23
- Weakness: CWE-918
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
- Revenue Administration E-Signature: from 2.4.4.0 before 2.5.1.0 — fixed in 2.5.1.0
How to fix
Upgrade to a fixed version: Revenue Administration E-Signature 2.5.1.0. Check the vendor advisory for mitigations.
References
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