CVE-2026-3204 | Improper input validation in the error message page in Devo… | CVSS 9.8 CRITICAL

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.

Metadata

CVE ID: CVE-2026-3204
State: PUBLISHED
Assigner: DEVOLUTIONS
Reserved: 2026-02-25 14:37 UTC
Published: 2026-03-03 21:24 UTC
Last updated: 2026-03-04 16:36 UTC
Primary CWE: CWE-20
CWE-20 Improper Input Validation
Vendor / Product: Devolutions / Server
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Devolutions	Server	—	0 ≤ 2025.3.16

Weakness (CWE)

CWE	Source	Description
CWE-20	cna	CWE-20 Improper Input Validation

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (1)

https://devolutions.net/security/advisories/DEVO-2026-0005