What is CVE-2026-70556?

CVE-2026-70556 is a medium-severity vulnerability in Hubzilla, classified under Cross-Site Request Forgery (CSRF). CVSS score: 4.3/10. Published 2026-08-06.

How severe is CVE-2026-70556?

Medium severity. CVSS v3 base score is 4.3 out of 10.

CSRF in Hubzilla

CVE-2026-70556

Hubzilla 11.2.1 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 auth…

Vulnerability class: CSRF (Cross-Site Request Forgery)

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

Affected products

Hubzilla — versions 0

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

disclosure@vulncheck.com (product)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-70556?: CVE-2026-70556 is a medium-severity vulnerability in Hubzilla, classified under Cross-Site Request Forgery (CSRF). CVSS score: 4.3/10. Published 2026-08-06.
How severe is CVE-2026-70556?: Medium severity. CVSS v3 base score is 4.3 out of 10.