What is CVE-2026-43937?

CVE-2026-43937 is a high-severity vulnerability in Yafnet, classified under SQL Injection. CVSS score: 8.8/10. Published 2026-05-12.

How severe is CVE-2026-43937?

High severity. CVSS v3 base score is 8.8 out of 10.

SQL Injection in Yafnet

CVE-2026-43937

YetAnotherForum.NET (YAF.NET) is a C# ASP.NET forum. Prior to 4.0.5, Any admin OnPost… handler executes its side effects before the ResultFilterAttribute rewrites the response to a 302 to /Info/4. The most impactful abuse is /Admin/RunSql…

Vulnerability class: SQL Injection

EPSS: 0.000 (8.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Yafnet — versions < 4.0.5

Weakness classification (CWE)

CWE-89 — SQL Injection
CWE-841 — Improper Enforcement of Behavioral Workflow

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-43937?: CVE-2026-43937 is a high-severity vulnerability in Yafnet, classified under SQL Injection. CVSS score: 8.8/10. Published 2026-05-12.
How severe is CVE-2026-43937?: High severity. CVSS v3 base score is 8.8 out of 10.