---
title: "CVE-2026-110839: FreeRDP - Denial of Service"
description: "FreeRDP < 3.32.0 built with WINPR_UTILS_IMAGE_JPEG=ON contains a heap-based out-of-bounds write caused by incorrect buffer sizing in winpr_convert_from_jpeg, letting malicious RDP servers crash clients via clipboard redirection with grayscale JPEGs."
url: https://panop.io/threat-heartbeat/CVE-2026-110839/
---

# CVE-2026-110839 FreeRDP - Denial of Service

FreeRDP < 3.32.0 built with WINPR\_UTILS\_IMAGE\_JPEG=ON contains a heap-based out-of-bounds write caused by incorrect buffer sizing in winpr\_convert\_from\_jpeg, letting malicious RDP servers crash clients via clipboard redirection with grayscale JPEGs.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-110839)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

Published

14 October 2026

Updated

15 October 2026

Weakness

[CWE-787](https://cwe.mitre.org/data/definitions/787.html)

## Vendor fix

Update to version 3.32.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-110839](https://nvd.nist.gov/vuln/detail/CVE-2026-110839)
- [https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4](https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4)
- [https://www.vulncheck.com/advisories/freerdp-3.3.0-before-3.32.0-heap-out-of-bounds-write-via-grayscale-jpeg-clipboard-data](https://www.vulncheck.com/advisories/freerdp-3.3.0-before-3.32.0-heap-out-of-bounds-write-via-grayscale-jpeg-clipboard-data)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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