What is CVE-2016-9839?

CVE-2016-9839 is a high-severity vulnerability in Osgeo Mapserver, classified under Information Disclosure. CVSS score: 7.5/10. Published 2016-12-08.

How severe is CVE-2016-9839?

High severity. CVSS v3 base score is 7.5 out of 10.

Information disclosure in Osgeo Mapserver

CVE-2016-9839

In MapServer before 7.0.3, OGR driver error messages are too verbose and may leak sensitive information if data connection fails.

Vulnerability class: Information Disclosure

Published 2016-12-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.015 (73.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Osgeo Mapserver

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

github.com/mapserver/mapserver/pull/5356 (Vendor Advisory)
www.securityfocus.com/bid/94856 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)

Frequently asked questions

What is CVE-2016-9839?: CVE-2016-9839 is a high-severity vulnerability in Osgeo Mapserver, classified under Information Disclosure. CVSS score: 7.5/10. Published 2016-12-08.
How severe is CVE-2016-9839?: High severity. CVSS v3 base score is 7.5 out of 10.