CVE-2026-107249
Block AJAX - Highly critical - PHP object injection - SA-CONTRIB-2026-192
Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Drupal Block AJAX allows Object Injection. This issue affects Block AJAX versions: from 0.0.0 to 3.0.2.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Block AJAX - Highly critical - PHP object injection - SA-CONTRIB-2026-192
Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Drupal Block AJAX allows Object Injection. This issue affects Block AJAX versions: from 0.0.0 to 3.0.2.
- Record
CVE-2026-107249- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-915
- Updated
- 2026-11-02
EUVDEUVD-2026-113583
Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Drupal Block AJAX allows Object Injection. This issue affects Block AJAX versions: from 0.0.0 to 3.0.2.
- Record
EUVD-2026-113583- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-6pcx-w9cj-f597
Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in...
Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Drupal Block AJAX allows Object Injection. This issue affects Block AJAX versions: from 0.0.0 to 3.0.2.
- Record
GHSA-6pcx-w9cj-f597- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-915
- Updated
- 2026-11-02
NVD
Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Drupal Block AJAX allows Object Injection. This issue affects Block AJAX versions: from 0.0.0 to 3.0.2.
- Record
CVE-2026-107249- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-915
- Updated
- 2026-11-02
OSV
Block AJAX - Highly critical - PHP object injection - SA-CONTRIB-2026-192
Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Drupal Block AJAX allows Object Injection. This issue affects Block AJAX versions: from 0.0.0 to 3.0.2.
- Record
CVE-2026-107249- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-915
- Updated
- 2026-11-02
OSVDRUPAL-CONTRIB-2026-192 No score
The Block AJAX module enables you to load blocks asynchronously via Ajax.
The module doesn't sufficiently validate user-supplied data which is used to construct a block. In the worst case scenario, this can lead to PHP Object Injection and Remote Code Execution.
The vulnerability is mitigated by the fact that it only affects sites that have Layout Builder enabled (or another block plugin that handles the data this module passes to it in a potentially unsafe way).
Please see the release notes for details of potentially breaking changes.
- Record
DRUPAL-CONTRIB-2026-192- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
drupal/block_ajaxPackagist:https://packages.drupal.org/8 |
before 3.0.2 | 3.0.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-107249 is a critical vulnerability (CVSS 9.8) in Drupal Block Ajax, published October 7, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 33rd percentile. Fixed in drupal/block_ajax 3.0.2.