TI-2017-04646 Aliases CVE-2017-6920 GHSA-9c24-g32g-35rj

Code injection in Drupal Core

MEDIUM 61CWE-19Published 2018-08-06 · Updated 2024-09-16

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-94.

Summary

Drupal core 8 before versions 8.3.4 allows remote attackers to execute arbitrary code due to the PECL YAML parser not handling PHP objects safely during certain operations.

Why it matters now

EPSS 0.20239 97th percentileScored 2026-11-07

Fix Fixed Drupal Core (Drupal.org): 8.3.4drupal/core (Packagist): 8.3.4+1 more product

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Drupal	Drupal Core	8 to before 8.3.4	8.3.4	Patch available	CNA
—	drupal/core (Packagist)	8.0 to before 8.3.4	8.3.4	Patch available	GHSA-9c24-g32g-35rj
—	drupal/drupal (Packagist)	8.0 to before 8.3.4	8.3.4	Patch available	GHSA-9c24-g32g-35rj

Drupal Core VendorDrupal Affected 8 to before 8.3.4 Fixed in 8.3.4 Patch available CNA
drupal/core (Packagist) Vendor— Affected 8.0 to before 8.3.4 Fixed in 8.3.4 Patch available GHSA-9c24-g32g-35rj
drupal/drupal (Packagist) Vendor— Affected 8.0 to before 8.3.4 Fixed in 8.3.4 Patch available GHSA-9c24-g32g-35rj

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:drupal:drupal::::::::	8.0.0 to before 8.3.4	Vulnerable	Drupal

cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:* Versions 8.0.0 to before 8.3.4 Vulnerable ·Drupal

Remediation

Fix · CNA Drupal Core (Drupal.org) Fixed in 8.3.4
Fix · GHSA-9c24-g32g-35rj drupal/core (Packagist) Fixed in 8.3.4 Advisory →
Fix · GHSA-9c24-g32g-35rj drupal/drupal (Packagist) Fixed in 8.3.4 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2017-6920
2026-10-03 Alias added: GHSA-9c24-g32g-35rj

References

Patch 1

https://www.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-06-21/drupal-core-multiple

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2017-6920

Other 4

TI-2026-07979 Drupal core - Highly critical - SQL injection - SA-CORE-2026-004 KEVCVSS 3.1CRITICAL 9.8
TI-2018-05494 Drupal core - Highly critical - Remote Code Execution - SA-CORE-2018-004 KEVCVSS 3.1CRITICAL 9.8
TI-2018-05493 Improper input validation in Drupal before 7.58, 8.x before 8.3.9, 8.4.x before 8.4.6… KEVCVSS 3.1CRITICAL 9.8
TI-2020-10731 Unrestricted file upload in Drupal Core KEVCVSS 3.1HIGH 8.8
TI-2019-04505 Drupal core - Highly critical - Remote Code Execution KEVCVSS 3.1HIGH 8.1
TI-2020-17477 Archive_Tar through 1.4.10 has :// filename sanitization only to address phar attacks… KEVCVSS 3.1HIGH 7.8

See all 278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences