CVE-2026-110839

HIGH 7.1

FreeRDP 3.3.0 before 3.32.0 Heap Out-of-Bounds Write via Grayscale JPEG Clipboard Data

CVSS Score

7.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-787
Vendor	freerdp
Product	freerdp
Published	Oct 14, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

High

Affected Versions

FreeRDP / FreeRDP

3.3.0 < 3.32.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4 vulncheck.com: https://www.vulncheck.com/advisories/freerdp-3.3.0-before-3.32.0-heap-out-of-bounds-write-via-grayscale-jpeg-clipboard-data

Credits

Kushalkhemka mayank-jangid-moon skigeek16 opensec-intelligence