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CVE-2026-32854

Published: Mar 24, 2026

Modified: Mar 27, 2026

PUBLISHED

Description

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.

Vendor	Product	Versions
LibVNC	LibVNCServer	affected `0 - <= 0.9.15` unaffected `dc78dee51a7e270e537a541a17befdf2073f5314`

Weaknesses (CWE)

References

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

vendor-advisory

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

patch

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

third-party-advisory

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