CVE-2026-32854 MEDIUM

CVE-2026-32854: LibVNCServer httpd proxy NULL Pointer Dereference

Vendor Libvnc
Product LibVNCServer
Weakness CWE-476
Published March 24, 2026
Last update March 27, 2026
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CVSS base score

6.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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 crafted HTTP requests. Attackers can exploit missing validation of strchr() return values in the CONNECT and GET proxy handling paths to trigger null pointer dereferences and crash the server when httpd and proxy features are enabled.

Key dates

02Disclosure timeline

March 24, 2026 CVE published
March 27, 2026 Record updated