🛡️ CVE-2026-55804 — drupal

🟡 CVSS 5.0 — Medium ✅ No Known Exploit CWE-915 OSV
5.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Drupal core contains a chain of methods that could be exploitable when an insecure deserialization vulnerability exists on the site. This so-called "gadget chain" presents no direct threat, but is a vector that can be used to achieve remote code execution or SQL injection if the application deserializes untrusted data due to another vulnerability.

This issue is not directly exploitable.

This issue is mitigated by the fact that in order for it to be exploitable, a separate vulnerability must be present to allow an attacker to pass unsafe input to unserialize().

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs administrative privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability none.

Weakness class

CVE-2026-55804 is classified as CWE-915: Improperly Controlled Modification of Object Attributes. A request can set object fields that were never meant to be writable from outside.

Affected software

CVE-2026-55804 is recorded against 2 packages.

  • drupal
  • drupal/core (from 11.1.0 up to 11.2.0)

Timeline and source

Published on 19 July 2026 and last revised on 20 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Web)
www.drupal.org (Web)

Details

Severity MEDIUM
CVSS Score 5.0
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
CWE CWE-915
Public Exploit ✅ No
Source OSV
Published 2026-07-19
Updated 2026-08-12
Modified 2026-07-20
Fix URL N/A

Affected Packages

Software From version Fixed in
drupal — —
drupal/core 11.1.0 11.2.0

Similar Threats

Vulnerability Monitoring

Track new vulnerabilities in drupal

CVE-2026-55804 is rated CVSS 5.0 Medium. BotEraser monitors your WordPress installation and notifies you when software you use appears in our vulnerability database.

Set Up Free Alerts →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

Browse related advisories

All advisoriesCVECVE 2026