DotVVM: ReDOS in routing

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-57577
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-14 18:17:57 UTC
Updated2026-09-30 19:57:08 UTC
DescriptionDotVVM 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.

Risk And Classification

Primary CVSS: v4.0 8.2 HIGH from [email protected]

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.005770000 probability, percentile 0.472660000 (date 2026-10-26)

Problem Types: CWE-1333 | CWE-1333 CWE-1333: Inefficient Regular Expression Complexity

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary8.2HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNADECLARED8.2HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Riganti Dotvvm affected < 4.2.11 Not specified
CNA Riganti Dotvvm affected >= 4.3.0, < 4.3.15 Not specified
CNA Riganti Dotvvm affected >= 5.0.0-preview01, < 5.0.0-preview09-final Not specified

References

ReferenceSourceLinkTags
github.com/riganti/dotvvm/commit/1635245b5eaf9ccf8e3536b9d8b1941819526585 [email protected] github.com
github.com/riganti/dotvvm/releases/tag/v5.0.0-preview09 [email protected] github.com
github.com/riganti/dotvvm/security/advisories/GHSA-c2g3-c4gc-w5wg [email protected] github.com
github.com/riganti/dotvvm/commit/4fc26a8591c76fb92ed701352c2a84120cf926c5 [email protected] github.com
github.com/riganti/dotvvm/releases/tag/v4.3.15 [email protected] github.com
github.com/riganti/dotvvm/commit/5728ab80fff9af883b44d11c118d2e8a8991dcd4 [email protected] github.com
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