Improper input validation in Freerdp
CVE-2026-121411
FreeRDP before 3.32.2 fails to bound server-supplied target dimensions and output origin in RDPGFX MAPSURFACETOSCALEDOUTPUT PDUs, allowing malicious RDP servers to abort X11 clients. Attackers can map a surface to oversized scaled output, triggering checked UINT16 cast or freerdp_image_scale stride assertion failures that terminate the client.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-wffv-rjv2-h2x2 (vendor-advisory, Vendor Advisory)
- www.vulncheck.com/advisories/freerdp-before-3.32.2-x11-client-abort-via-rdpgfx-… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-121411?
- CVE-2026-121411 is a low-severity vulnerability in Freerdp, classified under Improper Input Validation. CVSS score: 3.1/10. Published 2026-11-03.
- How severe is CVE-2026-121411?
- Low severity. CVSS v3 base score is 3.1 out of 10.