CVE-2026-110839

7.1

FreeRDP Out-of-Bounds Write Vulnerability

CVSS: 7.1, high high CVSS v3.1
EPSS, next 30 days: 0.2% higher than 11.8% of scored CVEs
Exploitation: No public evidence
Published: 14 Oct 20263 days ago

Description

FreeRDP 3.3.0 before 3.32.0, when built with WINPR_UTILS_IMAGE_JPEG=ON, has a heap-based out-of-bounds write in winpr_convert_from_jpeg because grayscale JPEG buffers are sized from one input component rather than three BGR output components. A malicious RDP server can offer a grayscale JPEG via clipboard redirection, corrupting client memory and crashing it when the item is pasted as CF_DIB bitmap data.

Details

Vendor: FreeRDP
Product: FreeRDP
Weakness: CWE-787 (opens in a new tab)
Status: Received
Updated: 14 Oct 2026
Assigner: disclosure@vulncheck.com

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

References 2

Advisories 1

github.com /FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4 (opens in a new tab)

Other references 1

vulncheck.com /advisories/freerdp-3.3.0-before-3.32.0-heap-out-of-bounds-write-via-grayscale-jpeg-clipboard-data (opens in a new tab)

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other FreeRDP CVEs

Every FreeRDP CVE we hold

Same vendor in what we hold, not a known link between the flaws.

CVE-2026-111378 FreeRDP Uncontrolled Resource Consumption Vulnerability EPSS 0.3% 7.5, high
CVE-2026-111379 FreeRDP Heap-based Buffer Overflow Vulnerability EPSS 0.1% 7.3, high
CVE-2026-111380 FreeRDP Integer Overflow Vulnerability EPSS 0.3% 8.8, high
CVE-2026-111381 FreeRDP Heap-based Buffer Overflow Vulnerability EPSS 0.1% 7.3, high
CVE-2026-111382 FreeRDP Out-of-Bounds Write Vulnerability EPSS 0.3% 8.8, high
CVE-2026-110837 FreeRDP Heap-based Buffer Overflow Vulnerability EPSS 0.3% 7.1, high
CVE-2026-110838 FreeRDP Missing Authentication for Critical Function Vulnerability EPSS 0.3% 7.5, high
CVE-2026-109676 FreeRDP Use-After-Free Vulnerability EPSS 0.3% 8.8, high

Beyond this page

Is CVE-2026-110839 in your network?

This page tells you how dangerous CVE-2026-110839 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.