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CRITICAL · 9.8

CVE-2026-3204

Improper input validation in the error message page in Devolutions Server 2025.3.16 and earlier allows remote attackers to spoof the displayed error message via a specially crafted URL.

Vulnerability Description

Improper input validation in the error message page in Devolutions Server 2025.3.16 and earlier allows remote attackers to spoof the displayed error message via a specially crafted URL.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
DevolutionsDevolutions Server<= 2025.3.16.0

Related Weaknesses (CWE)

CWE-20

References

FAQ

What is CVE-2026-3204?

CVE-2026-3204 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Improper input validation in the error message page in Devolutions Server 2025.3.16 and earlier allows remote attackers to spoof the displayed error message via a specially crafted URL.

How severe is CVE-2026-3204?

CVE-2026-3204 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-3204?

Check the references section above for vendor advisories and patch information. Affected products include: Devolutions Devolutions Server.