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Product · LibVNC

libvncserver

5 known vulnerabilities.

libvncserver at a glance

Last 12 months
4
Critical · all time
0
Exploited · all time
0
Public exploit · all time
0
New vulnerabilities per month · last 12 months
0 1 2 December 2025: 0 vulnerabilities Dec 2025 January 2026: 0 vulnerabilities February 2026: 0 vulnerabilities March 2026: 2 vulnerabilities Mar April 2026: 0 vulnerabilities May 2026: 1 vulnerability June 2026: 0 vulnerabilities Jun July 2026: 0 vulnerabilities August 2026: 1 vulnerability September 2026: 0 vulnerabilities Sep October 2026: 0 vulnerabilities November 2026: 0 vulnerabilities
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All Critical High Medium Low Exploited only Public exploit

5 results · Feed

  • High 8.8
    CVE-2026-50538

    libvncclient Tight decoder has an attacker-controlled heap out-of-bounds write

    LibVNCClient is a library for easy implementation of a VNC client. In versions 0.9.12 through 0.9.15, a malicious (or man-in-the-middle) VNC server can force a connecting `libvncclient` to write attacker-controlled data past the end of its framebuffer. This i…

    LibVNC libvncserver libvncserver libvncserver Debian Ubuntu
  • High 8.8
    CVE-2026-44988

    LibVNCClient Tight Gradient decoding allows malicious server-triggered heap/stack OOB writes

    LibVNCClient is a library for easy implementation of a VNC client. In 0.9.15 and earlier, LibVNCClient's Tight encoding decoder uses fixed-size 2048-pixel scratch buffers for the Gradient filter, but it does not reject Tight rectangles whose width is larger t…

    LibVNC libvncserver libvncserver libvncserver Debian Ubuntu
  • Medium 6.3
    CVE-2026-32854

    LibVNCServer httpd proxy NULL Pointer Dereference

    LibVNCServer versions 0.9.15 and prior (fixed in commit dc78dee) contain null pointer dereference vulnerabilities in the HTTP proxy handlers within httpProcessInput() in httpd.c that allow remote attackers to cause a denial of service by sending specially cra…

    LibVNC libvncserver libvncserver libvncserver Debian Ubuntu
  • Medium 6.9
    CVE-2026-32853

    LibVNCServer UltraZip Encoding Heap Out-of-bounds Read

    LibVNCServer versions 0.9.15 and prior (fixed in commit 009008e) contain a heap out-of-bounds read vulnerability in the UltraZip encoding handler that allows a malicious VNC server to cause information disclosure or application crash. Attackers can exploit im…

    LibVNC libvncserver libvncserver libvncserver Debian Ubuntu
  • High 8.8
    CVE-2019-15690

    LibVNCServer 0.9.12 release and earlier contains heap buffer overflow vulnerability within the HandleCursorShape() func…

    LibVNC libvncserver libvncserver libvncserver Debian Ubuntu