Uncontrolled Resource Consumption in FreeRDP Proxy Affecting Users
CVE-2026-121412

7.1HIGH

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
3 November 2026

What is CVE-2026-121412?

FreeRDP versions prior to 3.32.2 are affected by a vulnerability that allows for uncontrolled resource consumption within the proxy component. This weakness enables attackers to manipulate the length of DATA_FIRST messages and exploit intercepted DVC message reassembly. By sending continuous message fragments without completion, the attack can lead to excessive heap memory retention, thereby degrading service performance and potentially leading to denial of service for legitimate users.

Affected Version(s)

FreeRDP 3.0.0 < 3.32.2

FreeRDP 3.32.2

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/freerdp-3.0.0-before...
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kushalkhemka
mayank-jangid-moon
opensec-intelligence
.