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CVE-2016-3166

20
FAUCET Score

CVE-2016-3166 is a CRLF injection vulnerability affecting Drupal 6.x before 6.38, specifically when used with PHP versions prior to 5.1.2. This flaw allows remote attackers to inject arbitrary HTTP headers, leading to HTTP response splitting attacks if a module permits user-submitted data in headers. Rated Medium severity (CVSS 5.9), it requires high attack complexity but can result in high integrity impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:a:drupal:drupal:6.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:a:drupal:drupal:6.0:beta1:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:a:drupal:drupal:6.0:beta2:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.18%
Probability of exploitation in next 30 days
EPSS Percentile
64.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0118 is in the 29th percentile among its peer group of 19,953 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: drupal/coreFixed in: 6.38
composerpatch availablevia ghsa
Product: drupal/drupalFixed in: 6.38

Vendor Advisories (1)

composerGHSA-fg5q-r2q5-qmh3medium

Drupal CRLF injection vulnerability in the drupal_set_header function

May 17, 2022

References

drupal.org / SA-CORE-2016-001
PatchVendor Advisory
debian.org / security/2016/dsa-3498
openwall.com / lists/oss-security/2016/02/24/19
openwall.com / lists/oss-security/2016/03/15/10