Vulnerability advisory

GHSA-jg68-vhv3-9r8f

Magento's X-Original-Url header can expose admin url

Published Feb 2, 2026Updated Feb 10, 2026OSV record ↗

Severity

Affected versions

Affected Fixed in

All versions before 20.16.1 20.16.1Advisories →

Affected	Fixed in
All versions before 20.16.1	`20.16.1`Advisories →
Also listed as affected (90) `1.9.1.1` `1.9.2.0` `1.9.2.1` `1.9.2.2` `1.9.2.3` `1.9.2.4` `1.9.3.0` `1.9.3.1` `v19.4.0` `v19.4.1` `v19.4.10` `v19.4.11` `v19.4.12` `v19.4.13` `v19.4.14` `v19.4.15` `v19.4.16` `v19.4.17` `v19.4.18` `v19.4.19` `v19.4.2` `v19.4.20` `v19.4.21` `v19.4.22` `v19.4.23` `v19.4.3` `v19.4.4` `v19.4.5` `v19.4.6` `v19.4.7` `v19.4.8` `v19.4.9` `v19.5.0` `v19.5.0-rc1` `v19.5.0-rc2` `v19.5.0-rc3` `v19.5.0-rc4` `v19.5.0-rc5` `v19.5.1` `v19.5.2` `v19.5.3` `v20.0.0` `v20.0.1` `v20.0.10` `v20.0.11` `v20.0.12` `v20.0.13` `v20.0.14` `v20.0.15` `v20.0.16` `v20.0.17` `v20.0.18` `v20.0.19` `v20.0.2` `v20.0.20` `v20.0.3` `v20.0.4` `v20.0.5` `v20.0.6` `v20.0.7` `v20.0.8` `v20.1.0` `v20.1.0-rc1` `v20.1.0-rc2` `v20.1.0-rc3` `v20.1.0-rc4` `v20.1.0-rc5` `v20.1.0-rc6` `v20.1.0-rc7` `v20.1.1` `v20.10.0` `v20.10.1` `v20.10.2` `v20.11.0` `v20.12.0` `v20.12.1` `v20.12.2` `v20.12.3` `v20.13.0` `v20.14.0` `v20.15.0` `v20.16.0` `v20.2.0` `v20.3.0` `v20.4.0` `v20.5.0` `v20.6.0` `v20.7.0` `v20.8.0` `v20.9.0`

Also listed as affected (90)

The admin url can be discovered without prior knowledge of it's location by exploiting the X-Original-Url header on some configurations.

The bug comes from the Zend library and is patche by unsetting the header in the bootstrap process.

Unset the X-Original-Url header in the web server configuration.

The activation of these headers is coming from the Zend_Controller module. It appears this has been known to some degree since 2016 - https://peterocallaghan.co.uk/2016/12/magento-poisoning-cache/ (dead link now..)