CVE-2026-57577
Published:September 14, 2026
Updated:October 10, 2026
DotVVM is an open source MVVM framework for web applications. Prior to 4.2.11, 4.3.15, and 5.0.0-preview09-final, a route containing multiple unconstrained parameters in one path segment can cause excessive regular-expression backtracking in DotvvmRoute.IsMatch when a remote requester supplies a long near-match path. DotvvmRouteParser.RouteRegex previously had no matching timeout. Patched runtimes retry with the .NET non-backtracking engine, while runtimes that do not support non-backtracking matching return HTTP 503 after the one-second timeout in DotvvmRoutingMiddleware. This issue is fixed in versions 4.2.11, 4.3.15, and 5.0.0-preview09-final.
Affected Packages
DotVVM.Framework (DOT_NET):
Affected version(s) >=4.0.0 <4.2.11Fix Suggestion:
Update to version 4.2.11DotVVM.Framework (DOT_NET):
Affected version(s) >=4.3.0.0 <4.3.15Fix Suggestion:
Update to version 4.3.15https://github.com/riganti/dotvvm.git (GITHUB):
Affected version(s) >=v5.0.0-preview01 <v5.0.0Fix Suggestion:
Update to version v5.0.0https://github.com/riganti/dotvvm.git (GITHUB):
Affected version(s) >=v4.3.0 <v4.3.15Fix Suggestion:
Update to version v4.3.15dotvvm (NUGET):
Affected version(s) >=4.0.0 <4.2.11Fix Suggestion:
Update to version 4.2.11dotvvm (NUGET):
Affected version(s) >=5.0.0-preview01-final <5.0.0Fix Suggestion:
Update to version 5.0.0dotvvm (NUGET):
Affected version(s) >=4.3.0 <4.3.15Fix Suggestion:
Update to version 4.3.15Related Resources (8)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Inefficient Regular Expression Complexity
EPSS
Base Score:
0.58