# YAFNET.Core (NuGet) vulnerabilities

3 known vulnerabilities (3 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 4.0.10 (Oct 21, 2026): no advisory affects it
- Newest unaffected release: 4.0.10 (Oct 21, 2026), the latest release
- Releases: 22 since 4.0.0 (Mar 16, 2025)
- Registry: https://www.nuget.org/packages/YAFNET.Core
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-43937: 4.0.0-beta03 to 4.0.4 (4.0.5 is outside it)
- CVE-2026-43938: 4.0.0-beta03 to 4.0.4 (4.0.5 is outside it)
- CVE-2026-43939: 4.0.0-beta03 to 4.0.4 (4.0.5 is outside it)

## Advisories (3)

### [CVE-2026-43937](https://cve.now/CVE-2026-43937): YAF.NET: Pre-Handler Authorization Bypass on Admin Pages Enabling Blind SQL Execution via \`/Admin/RunSql\`

- Severity: High 8.8
- Published: May 12, 2026
- Affected: fixed in 4.0.5.
- Fixed in 4.0.5 (released Apr 26, 2026, 16 days before disclosure).
- The latest release, 4.0.10, is not affected.

### [CVE-2026-43938](https://cve.now/CVE-2026-43938): YAF.NET: Unauthenticated Stored Second-Order XSS in Admin Event Log via Reflected \`User-Agent\` Header

- Severity: High 8.1
- Published: May 12, 2026
- Affected: from 4.0.0-beta01, fixed in 4.0.5; fixed in 3.2.12.
- Fixed in 4.0.5 (released Apr 26, 2026, 16 days before disclosure, the advisory names 3.2.12, which was never published).
- The latest release, 4.0.10, is not affected.

### [CVE-2026-43939](https://cve.now/CVE-2026-43939): YAF.NET: Stored XSS in Forum Thread Posts/Replies Allowing Arbitrary JavaScript Execution for All Thread Viewers

- Severity: High 7.3
- Published: May 12, 2026
- Affected: from 4.0.0-beta01, fixed in 4.0.5; fixed in 3.2.12.
- Fixed in 4.0.5 (released Apr 26, 2026, 16 days before disclosure, the advisory names 3.2.12, which was never published).
- The latest release, 4.0.10, is not affected.

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