CVE-2026-0944Network attack vector

Unauthorized group-content access via anonymous invitation matching

Published Feb 4, 2026 · Updated Feb 4, 2026

Access bypass in Drupal Group invite before 2.3.9, 3.0.0 through 3.0.3, and 4.0.0 through 4.0.3 lets remote attackers read group content. InvitationOperations and GroupInvitationAccessControl treat pending invitations with entity_id 0 as matching the anonymous account, whose user ID is also 0, instead of returning a neutral access result. Reachability requires uncommon invitation actions by a user permitted to create group invites; the resulting exposure is limited to otherwise unauthorized group content.

CVSS severity5.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Access bypass in Drupal Group invite before 2.3.9, 3.0.0 through 3.0.3, and 4.0.0 through 4.0.3 lets remote attackers read group content. InvitationOperations and GroupInvitationAccessControl treat pending invitations with entity_id 0 as matching the anonymous account, whose user ID is also 0, instead of returning a neutral access result. Reachability requires uncommon invitation actions by a user permitted to create group invites; the resulting exposure is limited to otherwise unauthorized group content.

The record

CVE
CVE-2026-0944
Published
Feb 4, 2026
Updated
Feb 4, 2026
Vendor
Avatar Uploader Project
Product
Group invite
Classifications
CWE-754, CAPEC-87, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 4, 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 <2.3.9
  2. Affected versionversion=3.0.0 <3.0.4
  3. Affected versionversion=4.0.0 <4.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Avatar Uploader Project · Group inviteversion=0.0.0 <2.3.9; version=3.0.0 <3.0.4; version=4.0.0 <4.0.4

Published CVSS scores

5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
CAPEC-87Forceful Browsing
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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