Denial of Service Vulnerability in FreeRDP Affected by Malformed PNG and JPEG Payloads
CVE-2026-121386

8.7HIGH

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
3 November 2026

What is CVE-2026-121386?

FreeRDP versions prior to 3.32.2 are susceptible to a denial of service vulnerability stemming from the WinPR library's failure to effectively handle errors related to malformed PNG and truncated JPEG images. This vulnerability can allow a malicious RDP server or a Man-in-the-Middle (MITM) attacker to send specially crafted clipboard payloads, which, upon processing, can cause the FreeRDP client to terminate unexpectedly.

Affected Version(s)

FreeRDP 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-before-3.32....
third-party-advisory

CVSS V4

Score:
8.7
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

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