CVE-2026-70556 (GCVE-0-2026-70556)

Vulnerability from cvelistv5 – Published: 2026-08-06 12:10 – Updated: 2026-09-24 14:18
VLAI
Title
Hubzilla version prior to 11.4 CSRF via OAuth2 /authorize Endpoint App Registration
Summary
Hubzilla versions prior to 11.4 contains a cross-site request forgery vulnerability in the OAuth2 /authorize endpoint handled by Zotlabs\Module\Authorize::post() that allows unauthenticated attackers to register arbitrary OAuth2 applications under an authenticated user's account by submitting a cross-origin POST request without CSRF token or Origin/Referer validation. Attackers can craft a malicious HTML form that autosubmits attacker-chosen OAuth2 parameters including client_id, client_secret, redirect_uri, and scope to silently register a persistent OAuth2 application, enabling interception of future OAuth2 authorization codes when the victim later authenticates against the attacker-controlled client.
Severity
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-06 14:07 UTC
CWE
  • CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 7427 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Hubzilla Hubzilla Affected: 0 , < 11.4 (custom)
Unaffected: 11.4 (custom)
    cpe:2.3:a:hubzilla:hubzilla:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-06 00:00
Credits
Harald Eilertsen
Show details on NVD website
To clipboard 

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