CVE-2026-102777 Server-side request forgery in Event Gallery for Joomla
An attacker can exploit SSRF in the Google Photos picker to leak OAuth tokens or access internal networks via a logged-in administrator session.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-102777?
CVE-2026-102777 is a medium-severity server-side request forgery vulnerability in svenbluege.de Event Gallery for Joomla, published on 5 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Joomla Extension - svenbluege.de - Server-side request forgery in the Google Photos picker in Event Gallery extension < 6.6.0 - The Google Photos picker of the back-end upload page fetches the thumbnails of the picked images through the server, with the OAuth access token of the Google Photos account. The task took the address to fetch from the request without checking it and asked for no form token. A prepared page on another web site could therefore make the server send the access token of the account to any address, or fetch addresses inside the server's network, in the name of a logged in administrator; a back-end user with the permission "Manage" could do the same directly. The token is valid for about an hour and reaches what the picker session of the account reaches.
Weakness: CWE-918
Which versions are affected by CVE-2026-102777?
It affects 1 product.
Products include Svenbluege Event Gallery.
How do I fix CVE-2026-102777?
No fix has been published for CVE-2026-102777 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-102777 being exploited?
There is no known exploitation of CVE-2026-102777 in the wild and no public exploit code.
Other vulnerabilities in svenbluege.de Event Gallery for Joomla
- CVE-2026-97164 Joomla Extension - svenbluege.de - Path Traversal in Clear Cache task in Event Gallery extension < 6.5.0
- CVE-2026-100748 Joomla Extension - svenbluege.de - CSRF in various cart actions in Event Gallery extension < 6.5.0
- CVE-2026-102778 Cross-site scripting in Event Gallery for Joomla
- CVE-2026-97165 Joomla Extension - svenbluege.de - Reflected XSS and open redirect in Event Gallery extension < 6.5.0
- CVE-2026-102776 Cross-site request forgery in Event Gallery for Joomla
Sources
Also known as GHSA-2gw6-8g27-32rm.