CVE-2026-105242
- Source
- https://cve.org/CVERecord?id=CVE-2026-105242
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-105242.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-105242
- Downstream
- Published
- 2026-10-06T19:50:19Z
- Modified
- 2026-10-28T02:30:47Z
- Severity
-
- 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
- Summary
- Apache log4net: Request validation failure drops the event in the aspnet-request converter
- Details
-
Improper Handling of Exceptional Conditions vulnerability in the aspnet-request pattern converter of Apache log4net.
Reading request parameters triggers ASP.NET request validation, so a request carrying content such as markup made the layout throw and the appender discarded the whole event. A sender could suppress the log record of their own request. Only applications on ASP.NET for .NET Framework whose layout uses %aspnet-request are affected.
This issue affects Apache log4net: from 1.2.11 before 3.5.0.
Users are recommended to upgrade to version 3.5.0, which fixes the issue.
- Database specific
{ "cna_assigner": "apache", "cwe_ids": [ "CWE-755" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105242.json" }- References
-
- http://www.openwall.com/lists/oss-security/2026/10/07/16
- https://nuget.org/packages
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105242.json
- https://lists.apache.org/thread.html/zg6dbqm4ztm7j3c21nfsqj0yxm5yrpdx
- https://nvd.nist.gov/vuln/detail/CVE-2026-105242
- https://github.com/apache/logging-log4net/commit/145203420c579a703008b4b723b6a080757f4964
- https://github.com/apache/logging-log4net/pull/316
- https://gitbox.apache.org/repos/asf/logging-log4net.git
Affected packages
Git / gitbox.apache.org/repos/asf/logging-log4net.git
Affected ranges
- Type
- GIT
- Repo
- https://gitbox.apache.org/repos/asf/logging-log4net.git
- Events
-
Introduced243f1e9f3ee235955bade4b4fe664a903378719aFixed145203420c579a703008b4b723b6a080757f4964
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "243f1e9f3ee235955bade4b4fe664a903378719a" }, { "fixed": "145203420c579a703008b4b723b6a080757f4964" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" } ] }
- Type
- GIT
- Repo
- https://github.com/apache/logging-log4net
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "cpe": "cpe:2.3:a:apache:log4net:*:*:*:*:*:*:*:*", "range": [ { "introduced": "1.2.11" }, { "fixed": "3.5.0" } ], "source": "CPE_RANGE" }, { "range": [ { "fixed": "145203420c579a703008b4b723b6a080757f4964" } ], "source": "REFERENCES_COMMIT" } ] }
Affected versions
rc/3.*
rc/3.0.1-preview.1
rc/3.0.1-preview.2
rc/3.0.1-rc1
rc/3.0.2-rc1
rc/3.0.3-preview.1
rc/3.0.3-rc1
rc/3.0.4-preview.1
rc/3.0.4-rc1
rc/3.1.0-rc1
rc/3.2.0-preview.1
rc/3.2.0-rc1
rc/3.3.0-rc1
rc/3.3.1-rc1
rc/3.3.2-rc1
rc/3.4.0-preview.1
rc/3.4.0-rc1
rc/3.4.1-preview.1
Other
rc/temp
rel/2.*
rel/2.0.10
rel/2.0.11
rel/2.0.12
rel/2.0.13
rel/2.0.14
rel/2.0.15
rel/2.0.16
rel/2.0.17
rel/2.x
rel/3.*
rel/3.0.1
rel/3.0.2
rel/3.0.3
rel/3.0.4
rel/3.1.0
rel/3.2.0
rel/3.3.0
rel/3.3.1
rel/3.3.2
rel/3.4.0