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CVE-2026-57577

DotVVM: ReDOS in routing

HIGH
8.2
CVSS Score
Published: September 14, 2026 at 05:37 PM UTC
Updated: September 30, 2026 at 07:57 PM UTC
1 product affected across 1 vendorDotvvm

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Severity
HIGH8.2
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Dotvvm· Riganti
60%
v < 4.2.11v < 4.3.15v < 5.0.0-preview09-final
Affected range stops below 4.2.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.3.15, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.0.0-preview09-final, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

x_refsource_CONFIRM
Source: cverecord
https://github.com/riganti/dotvvm/security/advisories/GHSA-c2g3-c4gc-w5wg
x_refsource_MISC
Source: cverecord
https://github.com/riganti/dotvvm/commit/1635245b5eaf9ccf8e3536b9d8b1941819526585
x_refsource_MISC
Source: cverecord
https://github.com/riganti/dotvvm/commit/4fc26a8591c76fb92ed701352c2a84120cf926c5
x_refsource_MISC
Source: cverecord
https://github.com/riganti/dotvvm/commit/5728ab80fff9af883b44d11c118d2e8a8991dcd4
x_refsource_MISC
Source: cverecord
https://github.com/riganti/dotvvm/releases/tag/v4.3.15
x_refsource_MISC
Source: cverecord
https://github.com/riganti/dotvvm/releases/tag/v5.0.0-preview09

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.2HIGHGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-1333

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