CVE-2026-110839

High

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.

SeverityHigh

CVSS7.1

Exploit probability—

ProductFreerdp

PublishedOct 14, 2026

First seenOct 14, 2026

Weakness typeCWE-787Out-of-bounds write

How to fix

Update

freerdp freerdp3.32.0 or later

Vendor advisories

github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4

Affected products

Product	Affected versions	Fixed in
freerdp freerdp	3.3.0 ≤ v < 3.32.0	3.32.0

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