Medium · CVSS 6.3CVE-2026-32854

LibVNCServer httpd proxy NULL Pointer DereferenceCVE-2026-32854

Answer in brief

CVE-2026-32854 records a Medium severity (CVSS 6.3) vulnerability in LibVNCServer httpd proxy NULL Pointer Dereference. The current sources do not mark it as known exploited. The current feed maps LibVNC/LibVNCServer (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Mar 24, 2026Updated Nov 8, 2026Source checked Nov 8, 2026First seen by HOL Nov 8, 2026Material review Nov 8, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 6.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps LibVNC/LibVNCServer (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
LibVNC/LibVNCServergeneric	>=0 <=0.9.15	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for LibVNC/LibVNCServer.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Mar 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Nov 8, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Nov 8, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.