---
id: "CVE-2026-121386"
kind: "vulnerability"
aliases: ["CVE-2026-121386"]
title: "FreeRDP: malformed PNG or JPEG clipboard data crashes the client"
severity: "high"
cvss: 8.7
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["freerdp", "linux", "package", "remote-desktop", "windows", "winpr"]
not_affected_if: ["fixed-version", "no-rdp-clients"]
published_at: "2026-11-03T15:17:25+00:00"
first_seen_at: "2026-11-03T15:21:56+00:00"
updated_at: "2026-11-03T15:22:36+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121386", "first_seen_at": "2026-11-03T15:21:56+00:00"}]
---

# FreeRDP: malformed PNG or JPEG clipboard data crashes the client

FreeRDP's WinPR library does not handle libpng and libjpeg errors when decoding clipboard images. A malicious RDP server or man-in-the-middle can send a malformed PNG or truncated JPEG, making the client abort or exit.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed FreeRDP version, for example with `xfreerdp /version`, and compare it with the fixed release.
- Look for FreeRDP builds or packages that bundle WinPR in your desktop or remote-access tooling.

## Fix

- FreeRDP `3.32.2` or later.

## Timeline

- 2026-11-03T15:21:56+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121386

## Documents

- [advisory] Vendor advisory: github.com https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-799q-hjgw-g55g
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/freerdp-before-3.32.2-denial-of-service-via-winpr-png-jpeg-image-readers

## From the sources

FreeRDP before 3.32.2 contains a denial of service vulnerability in WinPR's winpr_read_png_from_buffer() and winpr_convert_from_jpeg(), which lack libpng/libjpeg error handling. A malicious RDP server or MITM can offer a malformed PNG or truncated JPEG clipboard payload, causing the client to abort or exit.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_