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Authentication bypass in Devolutions Server device authorization flow

Priority LOW 32CWE-294Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-294.

Summary

Devolutions Server before 2026.3.8 has an authentication bypass in its OAuth device authorization flow, classified as CWE-294. A remote attacker who captures a device verification link can replay it to take over a user's account after an authenticated victim interacts with it.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Authentication bypass OAuth device authorization flow in Devolutions Server 2026.3.7.0 and earlier allows a remote attacker to take over a user's account via replay of a captured device verification link by an authenticated victim.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00404 34th percentileScored 2026-11-07
Fix Fixed Server (Devolutions): 2026.3.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
DevolutionsServerbefore 2026.3.82026.3.8Patch availableCNA
  • Server VendorDevolutions Affected before 2026.3.8 Fixed in 2026.3.8 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:*:*:*:*——Devolutions
  • cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:*:*:*:* Versions — — ·Devolutions

Remediation

Devolutions Server 2026.3.8 fixes the flaw, so upgrade to that version.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Server (Devolutions) Fixed in 2026.3.8

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Devolutions Server 2026.3.8

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-68602 Missing authorization in Devolutions Server global vaultPriority LOW 31
    • TI-2026-68494 Authentication bypass in Devolutions Server Azure AD login flowPriority LOW 31

Timeline

  1. 2026-10-06 Threatist record created from CVE-2026-105485
  2. 2026-10-07 Alias added: GHSA-h4fx-378p-mcpj

References

  • TI-2026-02787 Improper authentication in Devolutions Server CVSS 3.1CRITICAL 9.8
  • TI-2026-02768 Improper input validation in Devolutions Server CVSS 3.1CRITICAL 9.8
  • TI-2024-02729 Missing authentication in Devolutions Server CVSS 3.1CRITICAL 9.8
  • TI-2023-06040 Incorrect permission assignment in Devolutions Remote Desktop Manager CVSS 3.1CRITICAL 9.8
  • TI-2023-04041 Improper authentication in Devolutions Remote Desktop Manager CVSS 3.1CRITICAL 9.8
  • TI-2026-02702 Improper Enforcement of Behavioral Controls in Devolutions Server 2025.3.15 and earlier… CVSS 3.1CRITICAL 9.8
See all 212 →

Sources