HTTP Request Smuggling Affecting symfony/symfony package, versions >=5.2.0, <5.3.12
Snyk CVSS
Attack Complexity
High
Threat Intelligence
EPSS
0.09% (37th
percentile)
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Test your applications- Snyk ID SNYK-PHP-SYMFONYSYMFONY-1925896
- published 24 Nov 2021
- disclosed 24 Nov 2021
- credit Soner Sayakci, Jérémy Derussé
Introduced: 24 Nov 2021
CVE-2021-41267 Open this link in a new tabHow to fix?
Upgrade symfony/symfony to version 5.3.12 or higher.
Overview
symfony/symfony is a PHP framework for web applications and a set of reusable PHP components.
Affected versions of this package are vulnerable to HTTP Request Smuggling when X-Forwarded-Prefix header is accessible in sub-requests, even if it was not part of the "trusted_headers" allowed list.