CVE-2026-102777: Event Gallery Google Photos picker SSRF in backend

CVE-2026-102777 · Severity: info · Published 2026-10-05

Event Gallery is a Joomla gallery component that manages and displays images from various sources including Google Photos. The Google Photos picker in the backend's upload page can be exploited to send server requests to arbitrary addresses or internal network locations while impersonating the logged-in administrator's Google account. An attacker can steal the valid OAuth token or access internal resources by tricking an administrator into visiting a malicious webpage or by directly exploiting the picker as a backend user with Manage permissions.

Technologies: Svenbluege.De Event Gallery. Vendors: Svenbluege.De.

Quick answers

Is CVE-2026-102777 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-102777 being exploited in the wild.
How severe is CVE-2026-102777?
Informational severity, published 5 October 2026.
Which products and versions are affected?
Svenbluege.De Event Gallery before 6.6.0.
Is there a fix for CVE-2026-102777?
Yes: fixed in 6.6.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-102777 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-102777?
Check whether you run Svenbluege.De Event Gallery at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: 6.6.0

Technical details

The vulnerability is a server-side request forgery (SSRF) in the Google Photos picker backend component. The picker fetches image thumbnails through the server using the administrator's Google OAuth token but fails to validate the URL parameter or require a form token, allowing an attacker to redirect the request to arbitrary addresses. An authenticated backend user with Manage permission, or an external attacker via CSRF targeting an administrator, can exfiltrate the OAuth token (valid for ~1 hour) or probe the internal network in the account's context.

Affected products

  • svenbluege.de Event Gallery before 6.6.0

Timeline

  • 2026-10-05: disclosed

References

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