CVE-2026-43937

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Source
https://cve.org/CVERecord?id=CVE-2026-43937
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43937.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-43937
Aliases
Published
2026-05-12T14:00:35Z
Modified
2026-10-21T02:57:54Z
Severity
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
YAF.NET: Pre-Handler Authorization Bypass on Admin Pages Enabling Blind SQL Execution via `/Admin/RunSql`
Details

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, whose OnPostRunQuery binds Editor from the POST body and passes it straight to IDbAccess.RunSql with no caller check, yielding arbitrary SQL execution for any low-privileged user. This vulnerability is fixed in 4.0.5.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-841",
        "CWE-89"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43937.json"
}
References

Affected packages

Git / github.com/yafnet/yafnet

Affected ranges

Type
GIT
Repo
https://github.com/yafnet/yafnet
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
3cb0ee7fbc01f8d3e84eaddf55350aced2dd4bfc
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "4.0.5"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "4.0.5"
                }
            ],
            "source":  "DESCRIPTION"
        }
    ]
}

Affected versions

3.*
3.1.13.0
Other
aspnet20a
complete
complete2
release_0_8_1
release_0_8_2
release_0_9_0
release_0_9_1
release_0_9_2
release_0_9_3
release_0_9_4
release_0_9_5
release_0_9_6
release_0_9_7
release_0_9_8
release_0_9_8B
release_0_9_9
release_0_9_9b
release_1_0_2
release_1_9_4_BETA
release_1_9_4_FINAL
release_1_9_5_5_BETA
release_1_9_5_5_RTW
release_1_9_5_RC1
release_1_9_6_1_RTW
release_1_9_6_BETA1
release_1_9_6_FINAL
release_1_9_6_RC1
release_2_0_0_RC1
start
yaf_dnn2
v2.*
v2.0.0
v2.1
v2.1.2
v2.1.2-beta.1
v2.2.0
v2.2.0-beta.1
v2.2.0-rc.1
v2.2.1
v2.2.1.0-nightly.20
v2.2.2
v2.2.2.0-nightly.76
v2.2.3
v2.2.3.0-nightly.115
v2.2.3.0-nightly.118
v2.2.4.0
v2.2.4.0-nightly
v2.2.4.1
v2.2.4.10
v2.2.4.18
v2.2.4.19
v2.2.4.2
v2.2.4.3
v2.2.4.4
v2.2.4.5
v2.2.4.6
v2.2.4.7
v2.2.4.8
v2.2.4.9
v2.3.0.0
v2.3.0.0-BETA1
v2.3.0.0-beta.2
v2.3.0.0-beta.3
v2.3.0.0-beta.4
v2.3.0.0-rc.1
v2.3.0.0-rc.2
v2.3.0.0-rc.3
v2.3.0.0-rc.4
v2.3.0.0-rc.5
v2.3.0.4
v2.3.0.4-beta.1
v2.3.0.5-beta.1
v2.3.1.0
v3.*
v3.0.2
v3.1.0
v3.1.1
v3.1.10
v3.1.2
v3.1.3
v3.1.4
v3.1.5
v3.1.6
v3.1.7
v3.1.8
v3.1.9
v4.*
v4.0.0
v4.0.0-beta.1
v4.0.0-beta.3
v4.0.0-beta.7
v4.0.0-rc.1
v4.0.0-rc.2
v4.0.0-rc.3
v4.0.0-rc.4
v4.0.1
v4.0.2
v4.0.3
v4.0.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43937.json"