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CVE-2017-6920: Drupal PECL YAML parser unsafe object handling

critical Affects drupal/core, drupal/drupal. Feed 2026.10.29.1, updated 2026-10-28; published ; advisory modified .

Drupal PECL YAML parser unsafe object handling

Package
drupal/core Composer
Affected versions
>=8.0 and <8.3.4 or >=8.0 and <8.1.0 or >=8.1.0 and <8.2.0 or >=8.2.0 and <8.3.0 or >=8.3.0 and <8.3.4
Fixed in
8.3.4
Severity
critical  CVSS 9.8
Exploitation
not on CISA KEV · EPSS 20% (97.5th percentile)
Published
2022-05-14
Source
osv.dev

References

Drupal PECL YAML parser unsafe object handling

Package
drupal/drupal Composer
Affected versions
>=8.0 and <8.3.4 or >=8.0 and <8.1.0 or >=8.1.0 and <8.2.0 or >=8.2.0 and <8.3.0 or >=8.3.0 and <8.3.4
Fixed in
8.3.4
Severity
critical  CVSS 9.8
Exploitation
not on CISA KEV · EPSS 20% (97.5th percentile)
Published
2022-05-14
Source
osv.dev

References

CWE-94
NVD recorddrupal/core advisoriesdrupal/drupal advisories

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