Apr 2026: .NET Denial of Service Vulnerability
CVE-2026-26171 Published on April 14, 2026
.NET Denial of Service Vulnerability
Uncontrolled resource consumption in .NET allows an unauthorized attacker to deny service over a network.
Vulnerability Analysis
CVE-2026-26171 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Types
What is a Resource Exhaustion Vulnerability?
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
CVE-2026-26171 has been classified to as a Resource Exhaustion vulnerability or weakness.
What is a XXE Vulnerability?
The software processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.
CVE-2026-26171 has been classified to as a XXE vulnerability or weakness.
What is a XEE Vulnerability?
The software uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities. If the DTD contains a large number of nested or recursive entities, this can lead to explosive growth of data when parsed, causing a denial of service.
CVE-2026-26171 has been classified to as a XEE vulnerability or weakness.
Products Associated with CVE-2026-26171
You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-26171 are published in these products:
Affected Versions
Microsoft .NET 10.0:- Version 10.0.0 and below 10.0.6 is affected.
- Version 8.0.0 and below 8.0.26 is affected.
- Version 9.0.0 and below 9.0.15 is affected.
- Version 7.5.0 and below 7.5.6 is affected.
- Version 7.6.0 and below 7.6.1 is affected.
- Version 0:10.0.106-1.el10_1 and below * is unaffected.
- Version 0:8.0.126-1.el10_1 and below * is unaffected.
- Version 0:9.0.116-1.el10_1 and below * is unaffected.
- Version 0:9.0.116-1.el10_0 and below * is unaffected.
- Version 0:8.0.126-1.el10_0 and below * is unaffected.
- Version 0:8.0.126-1.el8_10 and below * is unaffected.
- Version 0:10.0.106-1.el8_10 and below * is unaffected.
- Version 0:9.0.116-1.el8_10 and below * is unaffected.
- Version 0:8.0.126-1.el9_7 and below * is unaffected.
- Version 0:10.0.106-1.el9_7 and below * is unaffected.
- Version 0:9.0.116-1.el9_7 and below * is unaffected.
- Version 0:8.0.126-1.el9_4 and below * is unaffected.
- Version 0:9.0.116-1.el9_6 and below * is unaffected.
- Version 0:8.0.126-1.el9_6 and below * is unaffected.
- Version 10.0.106-1.hum1 and below * is unaffected.
- Version 8.0.126-1.hum1 and below * is unaffected.
- Version 9.0.116-1.hum1 and below * is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.