CVE-2026-55809: Flag attendance field - Critical - PHP object injection - SA-CONTRIB-2026-049

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-10 · updated 2026-10-25
Weakness: CWE-915

Description

Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Drupal Flag attendance field allows Object Injection. This issue affects Flag attendance field versions: from 0.0.0 to 1.2.

Affected products

Drupal Flag attendance field: before 1.2 — fixed in 1.2

How to fix

Upgrade to a fixed version: Drupal Flag attendance field 1.2. Check the vendor advisory for mitigations.

References

https://www.drupal.org/sa-contrib-2026-049

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