CVE-2026-42899
ASP.NET Core Denial of Service Vulnerability
Severity Score
7.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Attend
*SSVC
Descriptions
Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Attend
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2026-04-30 CVE Reserved
- 2026-05-12 CVE Published
- 2026-05-14 CVE Updated
- 2026-05-15 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
CAPEC
References (1)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42899 | 2026-05-13 |
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Microsoft Search vendor "Microsoft" | .net Search vendor "Microsoft" for product ".net" | >= 8.0.0 < 8.0.27 Search vendor "Microsoft" for product ".net" and version " >= 8.0.0 < 8.0.27" | - |
Affected
| in | Apple Search vendor "Apple" | Macos Search vendor "Apple" for product "Macos" | - | - |
Safe
|
| Microsoft Search vendor "Microsoft" | .net Search vendor "Microsoft" for product ".net" | >= 8.0.0 < 8.0.27 Search vendor "Microsoft" for product ".net" and version " >= 8.0.0 < 8.0.27" | - |
Affected
| in | Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | - | - |
Safe
|
| Microsoft Search vendor "Microsoft" | .net Search vendor "Microsoft" for product ".net" | >= 8.0.0 < 8.0.27 Search vendor "Microsoft" for product ".net" and version " >= 8.0.0 < 8.0.27" | - |
Affected
| in | Microsoft Search vendor "Microsoft" | Windows Search vendor "Microsoft" for product "Windows" | - | - |
Safe
|
| Microsoft Search vendor "Microsoft" | .net Search vendor "Microsoft" for product ".net" | >= 9.0.0 < 9.0.16 Search vendor "Microsoft" for product ".net" and version " >= 9.0.0 < 9.0.16" | - |
Affected
| in | Apple Search vendor "Apple" | Macos Search vendor "Apple" for product "Macos" | - | - |
Safe
|
| Microsoft Search vendor "Microsoft" | .net Search vendor "Microsoft" for product ".net" | >= 9.0.0 < 9.0.16 Search vendor "Microsoft" for product ".net" and version " >= 9.0.0 < 9.0.16" | - |
Affected
| in | Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | - | - |
Safe
|
| Microsoft Search vendor "Microsoft" | .net Search vendor "Microsoft" for product ".net" | >= 9.0.0 < 9.0.16 Search vendor "Microsoft" for product ".net" and version " >= 9.0.0 < 9.0.16" | - |
Affected
| in | Microsoft Search vendor "Microsoft" | Windows Search vendor "Microsoft" for product "Windows" | - | - |
Safe
|
| Microsoft Search vendor "Microsoft" | .net Search vendor "Microsoft" for product ".net" | >= 10.0.0 < 10.0.8 Search vendor "Microsoft" for product ".net" and version " >= 10.0.0 < 10.0.8" | - |
Affected
| in | Apple Search vendor "Apple" | Macos Search vendor "Apple" for product "Macos" | - | - |
Safe
|
| Microsoft Search vendor "Microsoft" | .net Search vendor "Microsoft" for product ".net" | >= 10.0.0 < 10.0.8 Search vendor "Microsoft" for product ".net" and version " >= 10.0.0 < 10.0.8" | - |
Affected
| in | Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | - | - |
Safe
|
| Microsoft Search vendor "Microsoft" | .net Search vendor "Microsoft" for product ".net" | >= 10.0.0 < 10.0.8 Search vendor "Microsoft" for product ".net" and version " >= 10.0.0 < 10.0.8" | - |
Affected
| in | Microsoft Search vendor "Microsoft" | Windows Search vendor "Microsoft" for product "Windows" | - | - |
Safe
|