Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Libvncserver Project | Libvncserver | < 0.9.15 |
Related Weaknesses (CWE)
References
- https://github.com/LibVNC/libvncserver/commit/dc78dee51a7e270e537a541a17befdf207Patch
- https://github.com/LibVNC/libvncserver/security/advisories/GHSA-xjp8-4qqv-5x4xExploitVendor Advisory
- https://www.vulncheck.com/advisories/libvncserver-httpd-proxy-null-pointer-derefThird Party Advisory
FAQ
What is CVE-2026-32854?
CVE-2026-32854 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 atta...
How severe is CVE-2026-32854?
CVE-2026-32854 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-32854?
Check the references section above for vendor advisories and patch information. Affected products include: Libvncserver Project Libvncserver.