CVE-2026-32854CWE-476

LibVNCServer httpd proxy NULL Pointer Dereference

Medium · published March 24, 2026

CVSS v4.0
6.3
EPSS
5%
Percentile
92.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.3 · MEDIUM
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
EPSS
0.05415 · 92.7th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2026-03-24T17:31Z
EPSS history
Timeline
  • 24 MAR 17:31Z
    LibVNCServer httpd proxy NULL Pointer Dereference
    cvelistv5