CVE-2026-32854

HIGHNVD 7.56.3
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 6.3 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cna:vulncheck
Trending — 4 sources updated this weekElevated
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 5%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
7.5
EG Score
6.3(low)
EPSS
91.7%
KEV
Not listed

Published

March 24, 2026

Last Modified

July 14, 2026

Advisory Details (3)

Auto-updated Jul 15, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
generic

LibVNCServer httpd proxy NULL Pointer Dereference | Advisories | VulnCheck

https://www.vulncheck.com/advisories/libvncserver-httpd-proxy-null-pointer-dereference
github Patch Available🟡 PoC Available

NULL pointer dereferences in httpd proxy handlers via malformed CONNECT/GET requests · Advisory · LibVNC/libvncserver · GitHub

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

commit dc78dee51a7e (LibVNC/libvncserver)

Fix landed in LibVNC/libvncserver commit dc78dee51a7e — awaiting tagged release

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

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 9× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-16 17:03 UTCEPSS rescore
  2. 2026-07-16 17:03 UTCEPSS rescore
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 16:57 UTCEPSS rescore
  5. 2026-07-15 02:00 UTCEPSS rescore
  6. 2026-07-15 02:00 UTCEPSS rescore
  7. 2026-07-14 19:21 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  8. 2026-07-14 19:01 UTCEG score recompute
  9. 2026-07-14 19:00 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-32854?
CVE-2026-32854 is a high vulnerability published on March 24, 2026. 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…
When was CVE-2026-32854 disclosed?
CVE-2026-32854 was first published in the National Vulnerability Database on March 24, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-32854 actively exploited?
CVE-2026-32854 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 91.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-32854?
CVE-2026-32854 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.3. The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-32854?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-32854, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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