CVE-2026-91960CWE-190

CVE-2026-91960

Medium · published September 15, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
38.8
In the wild
Unconfirmed
What it is

FreeRDP versions before 3.31.0 contain an integer overflow in WinPR's Stream_EnsureRemainingCapacity function that allows remote attackers to cause denial of service. A malicious RD Gateway peer can send a WebSocket Ping frame with a crafted 64-bit extended payload length to trigger integer wraparound, resulting in a double free that crashes the FreeRDP client during connection.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00459 · 38.8th percentile
Weakness
CWE-190 · Integer Overflow or Wraparound
Published
2026-09-15T20:17Z
Affected products (1)
ProductVersionsFixed in
freerdp/freerdp< 3.31.03.31.0
References (3)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-vccg-35r5-8jrf · [email protected]https://www.vulncheck.com/advisories/freerdp-before-3.31.0-integer-overflow-double-free · [email protected]https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-vccg-35r5-8jrf · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 15 SEP 15:18Z
    FreeRDP before 3.31.0 Integer Overflow Double Free
    cvelistv5