CVE-2026-32854

HIGH7.5

LibVNCServer httpd proxy NULL Pointer Dereference

Published Mar 24, 2026

Modified 3 weeks ago

Details

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.

References

FIX

https://github.com/LibVNC/libvncserver/commit/dc78dee51a7e270e537a541a17befdf2073f5314

ADVISORY

https://github.com/LibVNC/libvncserver/security/advisories/GHSA-xjp8-4qqv-5x4x

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-32854

ADVISORY

https://www.vulncheck.com/advisories/libvncserver-httpd-proxy-null-pointer-dereference

CVSS Analysis

CVSS v4.0

6.3