Answer in brief
CVE-2026-16027 records a Medium severity (CVSS 5.4) vulnerability in Unauthenticated WebSocket-to-XAdES SSRF in Revenue Administration's E-Signature. The current sources do not mark it as known exploited. The current feed maps Revenue Administration/E-Signature (generic), Revenue Administration/Türkiye's E-Signature (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Revenue Administration/E-Signature (generic), Revenue Administration/Türkiye's E-Signature (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Revenue Administration/E-Signaturegeneric | >=2.4.4.0 <2.5.1.0 | 2.5.1.0 |
| Revenue Administration/Türkiye's E-Signaturegeneric | >=2.4.4.0 <2.5.1.0 | 2.5.1.0 |
Published upstream
Aug 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 7, 2026
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.
Quoted source text, attributed separately from HOL analysis.