CVE-2026-55804Network attack vector

Code execution or SQL injection via gadget chain

Published Jul 10, 2026 · Updated Jul 10, 2026

Object injection in Drupal core allows attackers to turn a separate unsafe-deserialization flaw into remote code execution or SQL injection. A chain of undisclosed core methods acts as PHP deserialization gadgets when attacker-controlled data reaches unserialize(). The chain is not directly exploitable: a separate flaw must pass unsafe input to unserialize(), after which the bounded impact is code execution or SQL injection.

CVSS severity5.9
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Object injection in Drupal core allows attackers to turn a separate unsafe-deserialization flaw into remote code execution or SQL injection. A chain of undisclosed core methods acts as PHP deserialization gadgets when attacker-controlled data reaches unserialize(). The chain is not directly exploitable: a separate flaw must pass unsafe input to unserialize(), after which the bounded impact is code execution or SQL injection.

The record

CVE
CVE-2026-55804
Published
Jul 10, 2026
Updated
Jul 10, 2026
Vendor
Avatar Uploader Project
Product
Drupal core
Classifications
CWE-915, CAPEC-586, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.0.0 <10.5.12
  2. Affected versionversion=0.0.0 <11.0.*
  3. Affected versionversion=0.0.0 <11.1.*
  4. Affected versionversion=10.6.0 <10.6.11
  5. Affected versionversion=11.2.0 <11.2.14
  6. Affected versionversion=11.3.0 <11.3.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Avatar Uploader Project · Drupal coreversion=0.0.0 <10.5.12; version=0.0.0 <11.0.*; version=0.0.0 <11.1.*; version=10.6.0 <10.6.11; version=11.2.0 <11.2.14; version=11.3.0 <11.3.12

Published CVSS scores

5.9CISA-ADPCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-915Improperly Controlled Modification of Dynamically-Determined Object Attributes
CAPEC-586Object Injection
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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