Technology · NuGet
log4net (NuGet) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 3 vulnerabilities in log4net (NuGet): 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-40021, was published on 10 April 2026.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 0
- Exploited in the wild
- 0
About log4net (NuGet)
Logging framework for .NET applications with configurable appenders and levels.
Latest log4net (NuGet) vulnerabilities
- CVE-2026-40021: Apache Log4net log suppression in XmlLayoutmediumCVSS 5.3EPSS 1.0%
- CVE-2006-0743: Apache log4net format string vulnerability causes DoSinfoEPSS 6.4%
- CVE-2018-1285: XML External Entity attack in log4netlowCVSS 3.1EPSS 17.4%
Most severe log4net (NuGet) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-40021: Apache Log4net log suppression in XmlLayoutmediumCVSS 5.3EPSS 1.0%
- CVE-2018-1285: XML External Entity attack in log4netlowCVSS 3.1EPSS 17.4%
- CVE-2006-0743: Apache log4net format string vulnerability causes DoSinfoEPSS 6.4%
Vulnerabilities per week
Nothing was published in the last eight weeks. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many log4net (NuGet) vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/nuget-log4net)<a href="https://junglewise.ai/threats/technologies/nuget-log4net"><img src="https://junglewise.ai/threats/technologies/nuget-log4net/badge.svg" alt="log4net (NuGet) vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/nuget-log4net.json, and this page as text at https://junglewise.ai/threats/technologies/nuget-log4net.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "log4net (NuGet) vulnerabilities", https://junglewise.ai/threats/technologies/nuget-log4net, 9 November 2026.