---
id: "CVE-2026-114043"
kind: "vulnerability"
aliases: ["CVE-2026-114043"]
title: "FreeRDP: malicious RDP server leaks heap memory via clipboard PNG"
severity: "high"
cvss: 7.1
epss: 0.00278
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["freerdp", "linux", "package", "rdp-clients", "windows"]
not_affected_if: ["clipboard-redirection-disabled", "trusted-servers-only"]
published_at: "2026-10-21T01:17:26+00:00"
first_seen_at: "2026-10-23T21:57:27+00:00"
updated_at: "2026-10-25T03:34:06+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114043", "first_seen_at": "2026-10-23T21:57:27+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-114043", "first_seen_at": "2026-10-24T13:15:55+00:00"}]
---

# FreeRDP: malicious RDP server leaks heap memory via clipboard PNG

FreeRDP's WinPR clipboard code mishandles low bit-depth PNG images when converting them to CF_DIB format, causing an out-of-bounds heap read. A malicious RDP server can send a crafted clipboard image that, when the victim pastes it, discloses megabytes of the client's heap memory.

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

## How to check

- Check the installed FreeRDP version (for example `xfreerdp /version`) and compare it with the fixed release.
- Confirm whether the client connects to servers you do not control.

## Fix

- Upgrade FreeRDP to `3.32.1` or later.
- Until upgraded, avoid connecting to untrusted RDP servers or pasting clipboard content from them.

## Timeline

- 2026-10-23T21:57:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-114043
- 2026-10-24T13:15:55+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-114043

## From the sources

FreeRDP before 3.32.1 contains a heap-based out-of-bounds read in WinPR's clipboard PNG-to-CF_DIB synthesis because winpr_read_png_from_buffer() allocates a bit-packed buffer for PNGs with bit depth below 8, while winpr_bitmap_write_buffer() copies rows assuming one byte per pixel. A malicious RDP server can send a crafted low-bit-depth PNG clipboard payload that, when pasted by the victim, discloses megabytes of heap memory.

---

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