How severe is CVE-2016-3164?

CVE-2016-3164 has a CVSS score of 7.4/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2016-3164?

CVE-2016-3164 affects the following packages: drupal/drupal (Packagist), drupal/drupal (Packagist), drupal/drupal (Packagist), drupal/core (Packagist), drupal/core (Packagist), drupal/core (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2016-3164?

Update drupal/drupal to 6.38 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2016-3164 is resolved across your whole dependency graph.

How do I detect CVE-2016-3164 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for drupal/drupal, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2016-3164 if there is no patch (or I can't update yet)?

Stop reflecting attacker-controlled destinations: resolve every redirect target against an allowlist of paths or hosts you own, prefer a server-side key over a full URL in the request, and reject absolute URLs entirely where the flow only ever needs a relative one.

Is CVE-2016-3164 actively exploited in the wild?

No public exploit code has been indexed for CVE-2016-3164 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2016-3164?

CVE-2016-3164 has an EPSS (Exploit Prediction Scoring System) score of 1.9%, placing it in the 80th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

When was CVE-2016-3164 published, and has it been updated?

CVE-2016-3164 was published on April 12, 2016 and was last updated on October 24, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘

🐘 Packagist

Not in CISA KEV

HIGH severity

CVE-2016-3164 — drupal

HIGH

CVE-2016-3164 is a high-severity (CVSS 7.4) vulnerability in drupal/drupal. A fix is available for drupal/drupal — see the affected versions and patch details below.

Drupal Open Redirect

Also known asGHSA-836p-6p4j-35cg

Published

Apr 12, 2016

Updated

Oct 24, 2026

Affected

6 pkgs

Patched

6 / 6

Exploits

None indexed

Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.9%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs80th percentile — riskier than 80% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

6 pkgs affected

🐘drupal/drupal🐘drupal/drupal🐘drupal/drupal🐘drupal/core🐘drupal/core🐘drupal/core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Drupal 6.x before 6.38, 7.x before 7.43, and 8.x before 8.0.4 might allow remote attackers to conduct open redirect attacks by leveraging (1) custom code or (2) a form shown on a 404 error page, related to path manipulation.

Affected Packages

6 total 6 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`drupal/drupal`	≥ 6.0&&< 6.38	6.38`composer require drupal/drupal:^6.38`
🐘Packagist	`drupal/drupal`	≥ 7.0&&< 7.43	7.43`composer require drupal/drupal:^7.43`
🐘Packagist	`drupal/drupal`	≥ 8.0&&< 8.0.4	8.0.4`composer require drupal/drupal:^8.0.4`
🐘Packagist	`drupal/core`	≥ 8.0&&< 8.0.4	8.0.4`composer require drupal/core:^8.0.4`
🐘Packagist	`drupal/core`	≥ 7.0&&< 7.43	7.43`composer require drupal/core:^7.43`
🐘Packagist	`drupal/core`	≥ 6.0&&< 6.38	6.38`composer require drupal/core:^6.38`

Affected Products

2 products · 143 configurations

debian linuxdebian

2 versions

7.08.0

Application

drupaldrupal

85 versions

6.06.16.26.36.46.56.66.76.86.96.106.11

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for drupal/drupal, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update drupal/drupal to 6.38 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2016-3164 is resolved across your whole dependency graph.
Workarounds
Stop reflecting attacker-controlled destinations: resolve every redirect target against an allowlist of paths or hosts you own, prefer a server-side key over a full URL in the request, and reject absolute URLs entirely where the flow only ever needs a relative one.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2016-3164 in your dependencies?

Find it across Packagist, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

7.4/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

None

Integrity

High

Availability

None

Raw vector

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

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

OpenSSF Scorecard

Package health score

security-advisories

4.8/10

Code-Review10/10

Maintained10/10

Branch-Protection0/10

Assessed Nov 9, 2026

Timeline

Disclosed

Apr 12, 2016

Last updated

Oct 24, 2026

Identifiers

CVE-2016-3164

GHSA-836p-6p4j-35cg

References

Advisorydebian.org · dsa 3498 Advisorynvd.nist.gov · CVE 2016 3164 Fixdrupal.org · SA CORE 2016 001 Webopenwall.com Webopenwall.com Webgithub.com · CVE 2016 3164.yaml Webgithub.com · CVE 2016 3164.yaml Packagegithub.com · drupal

Related vulnerabilities

This CVE is high severity; 2 of 8 other CVEs affecting drupal/drupal are rated as high or higher (top: high).

CVE-2024-55634CVE-2024-12393CVE-2024-55636CVE-2024-55638CVE-2024-55637CVE-2024-45440GHSA-337w-fxpq-5m34GHSA-58xv-7h9r-mx3c

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 24, 2026

CVE-2016-3164 — drupal

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2016-3164 in your dependencies?