What’s Vulnerable › Vulnerabilities

CVE-2026-109256: FreeRDP 3.10.0 through 3.32.2 Heap Buffer Overflow in WinPR PNG Conversion

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-12 · updated 2026-10-27
• Weakness: CWE-122

Description

FreeRDP 3.10.0 through 3.32.2 contains a heap buffer overflow in the WinPR png_write_data callback that writes past the buffer after a realloc failure. A malicious RDP clipboard peer can supply a large CF_DIB image that triggers out-of-bounds memcpy during PNG conversion, causing a client crash.

Affected products

• FreeRDP: from 3.10.0 before 3.32.2 — fixed in 3.32.2
• FreeRDP: from 3.10.0 through 3.32.2

How to fix

Upgrade to a fixed version: FreeRDP 3.32.2. Check the vendor advisory for mitigations.

References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-wf3x-658c-52m5
• https://www.vulncheck.com/advisories/freerdp-3.10.0-through-3.32.2-heap-buffer-overflow-in-winpr-png-conversion
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-wf3x-658c-52m5

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