Server-Side Request Forgery in Türkiye's E-Signature Product by Revenue Administration
CVE-2026-16027

5.4MEDIUM

Key Information:

Vendor

Revenue Administration

Status
E-signature
Vendor
CVE Published:
7 August 2026

What is CVE-2026-16027?

A Server-Side Request Forgery (SSRF) vulnerability exists in the E-Signature product by Revenue Administration Türkiye. This flaw allows an attacker to manipulate server requests, potentially leading to unauthorized data access and exploitation of sensitive resources. Versions prior to 2.5.1.0 are particularly susceptible, highlighting the need for prompt updates to maintain security integrity.

Affected Version(s)

E-Signature 2.4.4.0 < 2.5.1.0

References

https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/...
government-resource

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Sangsoo Jeong
.