What is CVE-2016-3171?

CVE-2016-3171 is a high-severity vulnerability in Drupal, classified under CWE-19. CVSS score: 8.1/10. Published 2016-04-12.

How severe is CVE-2016-3171?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Drupal

CVE-2016-3171

Drupal 6.x before 6.38, when used with PHP before 5.4.45, 5.5.x before 5.5.29, or 5.6.x before 5.6.13, might allow remote attackers to execute arbitrary code via vectors related to session data truncation.

Published 2016-04-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.032 (87.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: 0.000

Affected products

Drupal — versions 6.0, 6.1, 6.2
PHP — versions 5.5.0, 5.5.1, 5.5.2
Debian Linux — versions 7.0, 8.0

Weakness classification (CWE)

CWE-19

References

www.openwall.com/lists/oss-security/2016/02/24/19 (mailing-list)
www.openwall.com/lists/oss-security/2016/03/15/10 (mailing-list)
www.debian.org/security/2016/dsa-3498 (vendor-advisory)
www.drupal.org/SA-CORE-2016-001 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2016-3171?: CVE-2016-3171 is a high-severity vulnerability in Drupal, classified under CWE-19. CVSS score: 8.1/10. Published 2016-04-12.
How severe is CVE-2016-3171?: High severity. CVSS v3 base score is 8.1 out of 10.