Undertow vulnerabilitiesRanked by how likely they are to be used.
Undertow is made by Red Hat. We track 37 published vulnerabilities in it, across 174 versions. None of them is on the list of flaws known to be exploited today. If you run Undertow, keep it on a version the vendor still supports.
We keep watching the known-exploited list.
Which Undertow vulnerabilities are being exploited?
This is the list that matters most: flaws criminals are using now.
None of Undertow's published vulnerabilities is on the list of flaws known to be exploited today. We keep watching that list.
Which Undertow flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- 25%CVE-2014-7816Medium
Directory traversal vulnerability in JBoss Undertow 1.0.x before 1.0.17, 1.1.x before 1.1.0.CR5, and 1.2.x before 1.2.0.Beta3, when running on Windows, allows remote attackers to read arbitrary files via a ..
- 5.0%CVE-2020-1745Critical
A file inclusion vulnerability was found in the AJP connector enabled with a default AJP configuration port of 8009 in Undertow version 2.0.29.Final and before and was fixed in 2.0.30.Final.
- 3.6%CVE-2017-2670High
It was found in Undertow before 1.3.28 that with non-clean TCP close, the Websocket server gets into infinite loop on every IO thread, effectively causing DoS.
- 3.5%CVE-2019-10184High
undertow before version 2.0.23.Final is vulnerable to an information leak issue.
- 3.1%CVE-2017-2666Medium
It was discovered in Undertow that the code that parsed the HTTP request line permitted invalid characters.
- 3.0%CVE-2019-3888Critical
A vulnerability was found in Undertow web server before 2.0.21.
- 2.7%CVE-2023-3223High
A flaw was found in undertow. Servlets annotated with @MultipartConfig may cause an OutOfMemoryError due to large multipart content.
- 2.3%CVE-2018-1114Medium
It was found that URLResource.getLastModified() in Undertow closes the file descriptors only when they are finalized which can cause file descriptors to exhaust.
- 2.3%CVE-2025-9784High
A flaw was found in Undertow where malformed client requests can trigger server-side stream resets without triggering abuse counters.
- 2.1%CVE-2019-14888High
A vulnerability was found in the Undertow HTTP server in versions before 2.0.28.SP1 when listening on HTTPS.
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1 new flaw affects software Acme tracks
Directory traversal vulnerability in JBoss Undertow 1.0.x before 1.0.17, 1.1.x before 1.1.0.CR5, and 1.2.x before 1.2.0.Beta3, when running on Windows, allows remote attackers to read arbitrary files via a .. (dot dot) in a resource URI.
- Matched to
- Undertow on Acme's software list
- What to do
- Plan in the vendor’s update
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
We track 37 published vulnerabilities listed under the name Undertow, across 174 versions.
None of Undertow's vulnerabilities is on the list of flaws known to be exploited today.
Create a Precursor Intelligence account and track Undertow. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.